#### [Abblix\.Oidc\.Server](https://www.abblix.com/en/docs/api/abblix-oidc-server 'index')
### [Abblix\.Oidc\.Server\.Features](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Features 'Abblix\.Oidc\.Server\.Features')

## ServiceCollectionExtensions Class

Provides extension methods to [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') for configuring OpenID Connect \(OIDC\) server services\.

```csharp
public static class ServiceCollectionExtensions
```

Inheritance [System\.Object](https://learn.microsoft.com/en-us/dotnet/api/system.object 'System\.Object') → ServiceCollectionExtensions
### Methods

## ServiceCollectionExtensions\.AddAccessToken\(this IServiceCollection\) Method {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddAccessToken(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection)}

This method adds a service responsible for generating, validating, and managing access tokens\.
Access tokens are crucial for securing API endpoints, as they provide a mechanism to verify that
a request is authorized to access specific resources\.

```csharp
public static Microsoft.Extensions.DependencyInjection.IServiceCollection AddAccessToken(this Microsoft.Extensions.DependencyInjection.IServiceCollection services);
```
#### Parameters

###### `services` [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddAccessToken(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection).services}

The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') to configure with token\-related services\.

#### Returns
[Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')  
The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') so that additional calls can be chained\.

## ServiceCollectionExtensions\.AddAuthServiceJwt\(this IServiceCollection\) Method {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddAuthServiceJwt(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection)}

Registers JWT formatting and validation services for authentication within the specified [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')\.

```csharp
public static Microsoft.Extensions.DependencyInjection.IServiceCollection AddAuthServiceJwt(this Microsoft.Extensions.DependencyInjection.IServiceCollection services);
```
#### Parameters

###### `services` [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddAuthServiceJwt(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection).services}

The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') to add the JWT authentication services to\.

#### Returns
[Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')  
The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') for chaining further service registrations\.

## ServiceCollectionExtensions\.AddBackChannelAuthentication\(this IServiceCollection\) Method {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddBackChannelAuthentication(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection)}

Opts the server into Client\-Initiated Backchannel Authentication \(CIBA\)\. This single call registers the
CIBA feature services, the CIBA grant handler, the backchannel endpoint services and re\-enables the
[BackChannelAuthentication](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Common.Configuration.OidcEndpoints#Abblix.Oidc.Server.Common.Configuration.OidcEndpoints.BackChannelAuthentication 'Abblix\.Oidc\.Server\.Common\.Configuration\.OidcEndpoints\.BackChannelAuthentication') flag, which is off in the default
[EnabledEndpoints](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Common.Configuration.OidcOptions#Abblix.Oidc.Server.Common.Configuration.OidcOptions.EnabledEndpoints 'Abblix\.Oidc\.Server\.Common\.Configuration\.OidcOptions\.EnabledEndpoints')\. A server that never calls this method exposes no backchannel
endpoint and runs no CIBA grant\.

```csharp
public static Microsoft.Extensions.DependencyInjection.IServiceCollection AddBackChannelAuthentication(this Microsoft.Extensions.DependencyInjection.IServiceCollection services);
```
#### Parameters

###### `services` [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddBackChannelAuthentication(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection).services}

The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') to configure\.

#### Returns
[Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')  
The configured [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')\.

### Remarks
Call this \<b\>before\</b\>`AddOidcCore`/`AddOidcServices`: the CIBA grant handler must be
registered before `AddAuthorizationGrants()` composes the grant handlers at the end of
`AddOidcCore`, otherwise it is registered beside the composite and the token endpoint resolves the
wrong single `IAuthorizationGrantHandler`\.

## ServiceCollectionExtensions\.AddBackChannelLogout\(this IServiceCollection\) Method {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddBackChannelLogout(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection)}

Adds the necessary services for back\-channel logout functionality to the specified [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')\.

```csharp
public static Microsoft.Extensions.DependencyInjection.IServiceCollection AddBackChannelLogout(this Microsoft.Extensions.DependencyInjection.IServiceCollection services);
```
#### Parameters

###### `services` [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddBackChannelLogout(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection).services}

#### Returns
[Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')

## ServiceCollectionExtensions\.AddCheckSession\(this IServiceCollection\) Method {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddCheckSession(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection)}

Opts the server into the OpenID Connect Session Management check\-session endpoint\. This single call
registers the check\-session handler and re\-enables the [CheckSession](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Common.Configuration.OidcEndpoints#Abblix.Oidc.Server.Common.Configuration.OidcEndpoints.CheckSession 'Abblix\.Oidc\.Server\.Common\.Configuration\.OidcEndpoints\.CheckSession') flag,
which is off in the default [EnabledEndpoints](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Common.Configuration.OidcOptions#Abblix.Oidc.Server.Common.Configuration.OidcOptions.EnabledEndpoints 'Abblix\.Oidc\.Server\.Common\.Configuration\.OidcOptions\.EnabledEndpoints')\. Many SPAs do not use the
session\-management iframe, so it is opt\-in: a server that never calls this method exposes no check\-session
endpoint and does not advertise it in discovery\.

```csharp
public static Microsoft.Extensions.DependencyInjection.IServiceCollection AddCheckSession(this Microsoft.Extensions.DependencyInjection.IServiceCollection services);
```
#### Parameters

###### `services` [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddCheckSession(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection).services}

The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') to configure\.

#### Returns
[Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')  
The configured [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')\.

## ServiceCollectionExtensions\.AddClientAuthentication\(this IServiceCollection\) Method {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddClientAuthentication(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection)}

Registers client authentication services with the provided [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')\.
This setup includes various authenticators for supporting different client authentication methods
such as none, client secret post, client secret basic, private key JWT, and potentially others\.
It enables the application to handle client authentication according to the OAuth 2\.0 and OpenID Connect standards\.

```csharp
public static Microsoft.Extensions.DependencyInjection.IServiceCollection AddClientAuthentication(this Microsoft.Extensions.DependencyInjection.IServiceCollection services);
```
#### Parameters

###### `services` [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddClientAuthentication(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection).services}

The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') to add the client authentication services to\.

#### Returns
[Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')  
The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') so that additional calls can be chained\.

## ServiceCollectionExtensions\.AddClientInformation\(this IServiceCollection\) Method {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddClientInformation(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection)}

Configures services related to client information management\. This includes registering the client information storage mechanism,
which serves as the provider and manager for client information, as well as the provider for client keys\. This setup is crucial
for the OIDC server to manage and validate client identities and their corresponding secrets or keys\.

```csharp
public static Microsoft.Extensions.DependencyInjection.IServiceCollection AddClientInformation(this Microsoft.Extensions.DependencyInjection.IServiceCollection services);
```
#### Parameters

###### `services` [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddClientInformation(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection).services}

The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') to add the services to\.

#### Returns
[Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')  
The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') so that additional calls can be chained\.

## ServiceCollectionExtensions\.AddClientJwt\(this IServiceCollection\) Method {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddClientJwt(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection)}

Registers services for validating and formatting JWTs used in client authentication scenarios within
the specified [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')\.

```csharp
public static Microsoft.Extensions.DependencyInjection.IServiceCollection AddClientJwt(this Microsoft.Extensions.DependencyInjection.IServiceCollection services);
```
#### Parameters

###### `services` [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddClientJwt(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection).services}

The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') to add the client JWT validation and
            formatting services to\.

#### Returns
[Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')  
The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') for chaining further service registrations\.

### Remarks
This method adds services to the [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') that are responsible for validating and
formatting JWTs used specifically in client authentication\.
These services ensure that JWTs conform to the required standards,
include all necessary claims, and are properly validated for client authentication processes\.

## ServiceCollectionExtensions\.AddCommonServices\(this IServiceCollection\) Method {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddCommonServices(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection)}

Registers common services required by the application, like system clock, hashing services, etc\.

```csharp
public static Microsoft.Extensions.DependencyInjection.IServiceCollection AddCommonServices(this Microsoft.Extensions.DependencyInjection.IServiceCollection services);
```
#### Parameters

###### `services` [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddCommonServices(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection).services}

The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') to add the services to\.

#### Returns
[Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')  
The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') with the common services registered\.

## ServiceCollectionExtensions\.AddDeviceAuthorization\(this IServiceCollection\) Method {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddDeviceAuthorization(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection)}

Opts the server into the Device Authorization Grant \(RFC 8628\)\. This single call registers the device
feature services, the device endpoint \(handler, validators, options validator\) and re\-enables the
[DeviceAuthorization](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Common.Configuration.OidcEndpoints#Abblix.Oidc.Server.Common.Configuration.OidcEndpoints.DeviceAuthorization 'Abblix\.Oidc\.Server\.Common\.Configuration\.OidcEndpoints\.DeviceAuthorization') flag, which is off in the default
[EnabledEndpoints](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Common.Configuration.OidcOptions#Abblix.Oidc.Server.Common.Configuration.OidcOptions.EnabledEndpoints 'Abblix\.Oidc\.Server\.Common\.Configuration\.OidcOptions\.EnabledEndpoints')\. A server that never calls this method exposes no device
endpoint and runs no device options validation\.

```csharp
public static Microsoft.Extensions.DependencyInjection.IServiceCollection AddDeviceAuthorization(this Microsoft.Extensions.DependencyInjection.IServiceCollection services);
```
#### Parameters

###### `services` [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddDeviceAuthorization(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection).services}

The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') to configure\.

#### Returns
[Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')  
The configured [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')\.

### Remarks
Call this \<b\>before\</b\>`AddOidcCore`/`AddOidcServices`: the device\-code grant handler must be
registered before `AddAuthorizationGrants()` composes the grant handlers at the end of
`AddOidcCore`, otherwise it is registered beside the composite and the token endpoint resolves the
wrong single `IAuthorizationGrantHandler`\.

## ServiceCollectionExtensions\.AddDPoP\(this IServiceCollection\) Method {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddDPoP(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection)}

Registers the OAuth 2\.0 DPoP \(RFC 9449\) infrastructure: the proof
validator, the JWT replay cache it depends on \(via defensive
`TryAdd` so DPoP\-only deployments do not need to enable JWT Bearer
just to get the cache\), and the shared nonce\-service via
[AddNonces\(this IServiceCollection\)](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Features.ServiceCollectionExtensions#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddNonces(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection) 'Abblix\.Oidc\.Server\.Features\.ServiceCollectionExtensions\.AddNonces\(this Microsoft\.Extensions\.DependencyInjection\.IServiceCollection\)')\.

```csharp
public static Microsoft.Extensions.DependencyInjection.IServiceCollection AddDPoP(this Microsoft.Extensions.DependencyInjection.IServiceCollection services);
```
#### Parameters

###### `services` [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddDPoP(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection).services}

The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') to configure\.

#### Returns
[Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')  
The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') so additional calls can be chained\.

## ServiceCollectionExtensions\.AddDynamicClientRegistration\(this IServiceCollection\) Method {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddDynamicClientRegistration(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection)}

Opts the server into Dynamic Client Registration \(RFC 7591 / RFC 7592\)\. This single call registers the
registration, read, update and remove handlers and their validators, and re\-enables the
[RegisterClient](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Common.Configuration.OidcEndpoints#Abblix.Oidc.Server.Common.Configuration.OidcEndpoints.RegisterClient 'Abblix\.Oidc\.Server\.Common\.Configuration\.OidcEndpoints\.RegisterClient') flag, which is off in the default
[EnabledEndpoints](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Common.Configuration.OidcOptions#Abblix.Oidc.Server.Common.Configuration.OidcOptions.EnabledEndpoints 'Abblix\.Oidc\.Server\.Common\.Configuration\.OidcOptions\.EnabledEndpoints')\. Open registration widens the attack surface, so it is opt\-in:
a server that never calls this method exposes no registration endpoint and does not advertise it in
discovery\. New\-client defaults are taken from [NewClientOptions](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Common.Configuration.OidcOptions#Abblix.Oidc.Server.Common.Configuration.OidcOptions.NewClientOptions 'Abblix\.Oidc\.Server\.Common\.Configuration\.OidcOptions\.NewClientOptions')\.

```csharp
public static Microsoft.Extensions.DependencyInjection.IServiceCollection AddDynamicClientRegistration(this Microsoft.Extensions.DependencyInjection.IServiceCollection services);
```
#### Parameters

###### `services` [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddDynamicClientRegistration(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection).services}

The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') to configure\.

#### Returns
[Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')  
The configured [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')\.

## ServiceCollectionExtensions\.AddFrontChannelLogout\(this IServiceCollection\) Method {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddFrontChannelLogout(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection)}

Adds the necessary services for front\-channel logout functionality to the specified [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')\.
Front\-channel logout is typically used for web\-based applications where the logout request is sent directly from
the user's browser to the identity provider and other logged\-in services\.

```csharp
public static Microsoft.Extensions.DependencyInjection.IServiceCollection AddFrontChannelLogout(this Microsoft.Extensions.DependencyInjection.IServiceCollection services);
```
#### Parameters

###### `services` [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddFrontChannelLogout(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection).services}

#### Returns
[Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')

## ServiceCollectionExtensions\.AddIdentityToken\(this IServiceCollection\) Method {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddIdentityToken(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection)}

This method adds a service that handles identity tokens, which are used to convey the identity of
the authenticated user to the application\. Identity tokens typically contain claims about the user,
such as their name or role, which can be used for user interface customization and access control decisions\.

```csharp
public static Microsoft.Extensions.DependencyInjection.IServiceCollection AddIdentityToken(this Microsoft.Extensions.DependencyInjection.IServiceCollection services);
```
#### Parameters

###### `services` [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddIdentityToken(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection).services}

The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') to configure with token\-related services\.

#### Returns
[Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')  
The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') so that additional calls can be chained\.

## ServiceCollectionExtensions\.AddIntrospection\(this IServiceCollection\) Method {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddIntrospection(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection)}

Opts the server into the OAuth 2\.0 Token Introspection endpoint \(RFC 7662\)\. This single call registers the
introspection handler, validator and processor and re\-enables the [Introspection](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Common.Configuration.OidcEndpoints#Abblix.Oidc.Server.Common.Configuration.OidcEndpoints.Introspection 'Abblix\.Oidc\.Server\.Common\.Configuration\.OidcEndpoints\.Introspection')
flag, which is off in the default [EnabledEndpoints](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Common.Configuration.OidcOptions#Abblix.Oidc.Server.Common.Configuration.OidcOptions.EnabledEndpoints 'Abblix\.Oidc\.Server\.Common\.Configuration\.OidcOptions\.EnabledEndpoints')\. Introspection is chiefly
needed by resource servers validating opaque tokens; a server issuing self\-contained JWTs often does not
need it, so it is opt\-in\. A server that never calls this method exposes no introspection endpoint and does
not advertise it in discovery\.

```csharp
public static Microsoft.Extensions.DependencyInjection.IServiceCollection AddIntrospection(this Microsoft.Extensions.DependencyInjection.IServiceCollection services);
```
#### Parameters

###### `services` [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddIntrospection(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection).services}

The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') to configure\.

#### Returns
[Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')  
The configured [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')\.

## ServiceCollectionExtensions\.AddIssuer\(this IServiceCollection\) Method {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddIssuer(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection)}

Configures the issuer provider service to dynamically determine the issuer URI based on application settings\.
If an issuer is preconfigured in the options, a preconfigured issuer provider is used\.
Otherwise, a request\-based issuer provider is utilized to determine the issuer URI dynamically,
allowing for flexible deployment scenarios\.

```csharp
public static Microsoft.Extensions.DependencyInjection.IServiceCollection AddIssuer(this Microsoft.Extensions.DependencyInjection.IServiceCollection services);
```
#### Parameters

###### `services` [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddIssuer(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection).services}

The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') to add the issuer provider to\.

#### Returns
[Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')  
The modified [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') with the issuer provider configured\.

## ServiceCollectionExtensions\.AddLicense\(this IServiceCollection, string\) Method {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddLicense(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection,string)}

Registers the license JWT provider using a provided static license JWT string\.

```csharp
public static Microsoft.Extensions.DependencyInjection.IServiceCollection AddLicense(this Microsoft.Extensions.DependencyInjection.IServiceCollection services, string licenseJwt);
```
#### Parameters

###### `services` [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddLicense(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection,string).services}

The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') to add the license provider to\.

###### `licenseJwt` [System\.String](https://learn.microsoft.com/en-us/dotnet/api/system.string 'System\.String') {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddLicense(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection,string).licenseJwt}

The license JWT string to be used for OIDC service configuration validation\.

#### Returns
[Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')  
The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') for chaining further configurations\.

### Remarks
This method allows for direct specification of the license JWT, bypassing options configuration\.
It utilizes the [StaticLicenseJwtProvider](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Features.Licensing.StaticLicenseJwtProvider 'Abblix\.Oidc\.Server\.Features\.Licensing\.StaticLicenseJwtProvider') to supply the license JWT directly to the OIDC service\.
This approach is particularly useful in scenarios where the license JWT is obtained programmatically or from
external sources not tied to the application's static configuration\.

## ServiceCollectionExtensions\.AddLicenseFromOptions\(this IServiceCollection\) Method {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddLicenseFromOptions(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection)}

Registers the license JWT provider using options configuration to obtain the license JWT\.

```csharp
public static Microsoft.Extensions.DependencyInjection.IServiceCollection AddLicenseFromOptions(this Microsoft.Extensions.DependencyInjection.IServiceCollection services);
```
#### Parameters

###### `services` [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddLicenseFromOptions(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection).services}

The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') to add the license provider to\.

#### Returns
[Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')  
The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') for chaining further configurations\.

### Remarks
This method configures the OIDC service's licensing by using the [OptionsLicenseJwtProvider](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Features.Licensing.OptionsLicenseJwtProvider 'Abblix\.Oidc\.Server\.Features\.Licensing\.OptionsLicenseJwtProvider'),
which retrieves the license JWT from application settings or options\. It's suitable for scenarios where
the license JWT is configured through application settings \(e\.g\., appsettings\.json or environment variables\)\.

## ServiceCollectionExtensions\.AddLogoutNotification\(this IServiceCollection\) Method {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddLogoutNotification(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection)}

Configures services for logout notification mechanisms within the application\. This method
sets up both front\-channel and back\-channel logout capabilities, allowing the application to notify
clients about logout events through direct user agent redirection or server\-to\-server communication, respectively\.
It integrates a composite logout notifier that aggregates both mechanisms to provide a unified approach to logout notifications\.

```csharp
public static Microsoft.Extensions.DependencyInjection.IServiceCollection AddLogoutNotification(this Microsoft.Extensions.DependencyInjection.IServiceCollection services);
```
#### Parameters

###### `services` [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddLogoutNotification(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection).services}

The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') to add the logout notification services to\.

#### Returns
[Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')  
The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') so that additional calls can be chained\.

## ServiceCollectionExtensions\.AddNonces\(this IServiceCollection\) Method {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddNonces(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection)}

Registers the generic stateless\-nonce service\. The default
[RollingHmacNonceService](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Features.Nonces.RollingHmacNonceService 'Abblix\.Oidc\.Server\.Features\.Nonces\.RollingHmacNonceService') implementation is shared across
any feature that needs server\-issued, time\-bounded opaque tokens
\(DPoP\-Nonce per RFC 9449 §8 / §9 is the current consumer; future
candidates include state\-parameter validation and challenge\-response
patterns\)\. Idempotent via `TryAdd` so feature\-level
`Add*` methods can declare the dependency without contention\.

```csharp
public static Microsoft.Extensions.DependencyInjection.IServiceCollection AddNonces(this Microsoft.Extensions.DependencyInjection.IServiceCollection services);
```
#### Parameters

###### `services` [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddNonces(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection).services}

The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') to configure\.

#### Returns
[Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')  
The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') so additional calls can be chained\.

## ServiceCollectionExtensions\.AddPairwiseSubjectIdentifiers\(this IServiceCollection, PairwiseSubjectSettings\) Method {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddPairwiseSubjectIdentifiers(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection,Abblix.Oidc.Server.Features.UserInfo.PairwiseSubjectSettings)}

Registers pairwise subject identifier settings, enabling HMAC\-based subject conversion
for clients with SubjectType=pairwise\. The salt and hash algorithm are used to compute
stable, non\-reversible per\-client subject identifiers per OpenID Connect Core Section 8\.1\.

```csharp
public static Microsoft.Extensions.DependencyInjection.IServiceCollection AddPairwiseSubjectIdentifiers(this Microsoft.Extensions.DependencyInjection.IServiceCollection services, Abblix.Oidc.Server.Features.UserInfo.PairwiseSubjectSettings settings);
```
#### Parameters

###### `services` [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddPairwiseSubjectIdentifiers(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection,Abblix.Oidc.Server.Features.UserInfo.PairwiseSubjectSettings).services}

The service collection to register settings into\.

###### `settings` [PairwiseSubjectSettings](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Features.UserInfo.PairwiseSubjectSettings 'Abblix\.Oidc\.Server\.Features\.UserInfo\.PairwiseSubjectSettings') {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddPairwiseSubjectIdentifiers(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection,Abblix.Oidc.Server.Features.UserInfo.PairwiseSubjectSettings).settings}

The pairwise subject settings containing the HMAC salt and algorithm\.

#### Returns
[Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')

## ServiceCollectionExtensions\.AddRandomGenerators\(this IServiceCollection\) Method {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddRandomGenerators(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection)}

Adds singleton services for generating random client IDs, client secrets, token IDs, and session IDs
to the specified [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')\.

```csharp
public static Microsoft.Extensions.DependencyInjection.IServiceCollection AddRandomGenerators(this Microsoft.Extensions.DependencyInjection.IServiceCollection services);
```
#### Parameters

###### `services` [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddRandomGenerators(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection).services}

#### Returns
[Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')

## ServiceCollectionExtensions\.AddRefreshToken\(this IServiceCollection\) Method {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddRefreshToken(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection)}

This method adds a service that manages the lifecycle of refresh tokens, including their creation,
validation, and revocation\. Refresh tokens are used to obtain new access tokens without requiring
the user to re\-authenticate, enhancing the user experience by providing seamless session continuity\.

```csharp
public static Microsoft.Extensions.DependencyInjection.IServiceCollection AddRefreshToken(this Microsoft.Extensions.DependencyInjection.IServiceCollection services);
```
#### Parameters

###### `services` [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddRefreshToken(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection).services}

The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') to configure with token\-related services\.

#### Returns
[Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')  
The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') so that additional calls can be chained\.

## ServiceCollectionExtensions\.AddRequestObject\(this IServiceCollection\) Method {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddRequestObject(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection)}

Adds request object fetching capabilities to the dependency injection container\.
Registers services required for processing JWT request objects, including their validation
and binding to the appropriate request properties\.

```csharp
public static Microsoft.Extensions.DependencyInjection.IServiceCollection AddRequestObject(this Microsoft.Extensions.DependencyInjection.IServiceCollection services);
```
#### Parameters

###### `services` [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddRequestObject(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection).services}

The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') to which the user claims provider services will be
            added\. This collection is a mechanism for adding and retrieving dependencies in \.NET applications, often used
            to configure dependency injection in ASP\.NET Core applications\.

#### Returns
[Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')  
The updated [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') after adding the services, allowing for further
            modifications and additions to be chained\.

## ServiceCollectionExtensions\.AddRevocation\(this IServiceCollection\) Method {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddRevocation(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection)}

Opts the server into the OAuth 2\.0 Token Revocation endpoint \(RFC 7009\)\. This single call registers the
revocation handler, validator and processor and re\-enables the [Revocation](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Common.Configuration.OidcEndpoints#Abblix.Oidc.Server.Common.Configuration.OidcEndpoints.Revocation 'Abblix\.Oidc\.Server\.Common\.Configuration\.OidcEndpoints\.Revocation')
flag, which is off in the default [EnabledEndpoints](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Common.Configuration.OidcOptions#Abblix.Oidc.Server.Common.Configuration.OidcOptions.EnabledEndpoints 'Abblix\.Oidc\.Server\.Common\.Configuration\.OidcOptions\.EnabledEndpoints')\. This governs only the public
`/revoke` endpoint; the internal token\-revocation machinery that refresh\-token rotation, logout and
initial\-access\-token invalidation depend on is always registered and is unaffected\. A server that never
calls this method exposes no revocation endpoint and does not advertise it in discovery\.

```csharp
public static Microsoft.Extensions.DependencyInjection.IServiceCollection AddRevocation(this Microsoft.Extensions.DependencyInjection.IServiceCollection services);
```
#### Parameters

###### `services` [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddRevocation(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection).services}

The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') to configure\.

#### Returns
[Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')  
The configured [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')\.

## ServiceCollectionExtensions\.AddSecureHttpFetch\(this IServiceCollection, Action\<SecureHttpFetchOptions\>\) Method {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddSecureHttpFetch(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection,System.Action_Abblix.Oidc.Server.Features.SecureHttpFetch.SecureHttpFetchOptions_)}

Registers secure HTTP fetching services with SSRF \(Server\-Side Request Forgery\) protection\.
This method configures the HTTP client for fetching external content \(such as sector identifier URIs
and request URIs\) and decorates it with validation to prevent SSRF attacks\.

```csharp
public static Microsoft.Extensions.DependencyInjection.IServiceCollection AddSecureHttpFetch(this Microsoft.Extensions.DependencyInjection.IServiceCollection services, System.Action<Abblix.Oidc.Server.Features.SecureHttpFetch.SecureHttpFetchOptions>? configure=null);
```
#### Parameters

###### `services` [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddSecureHttpFetch(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection,System.Action_Abblix.Oidc.Server.Features.SecureHttpFetch.SecureHttpFetchOptions_).services}

The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') to configure\.

###### `configure` [System\.Action&lt;](https://learn.microsoft.com/en-us/dotnet/api/system.action-1 'System\.Action\`1')[SecureHttpFetchOptions](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Features.SecureHttpFetch.SecureHttpFetchOptions 'Abblix\.Oidc\.Server\.Features\.SecureHttpFetch\.SecureHttpFetchOptions')[&gt;](https://learn.microsoft.com/en-us/dotnet/api/system.action-1 'System\.Action\`1') {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddSecureHttpFetch(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection,System.Action_Abblix.Oidc.Server.Features.SecureHttpFetch.SecureHttpFetchOptions_).configure}

Optional configuration action to customize [SecureHttpFetchOptions](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Features.SecureHttpFetch.SecureHttpFetchOptions 'Abblix\.Oidc\.Server\.Features\.SecureHttpFetch\.SecureHttpFetchOptions')\.

#### Returns
[Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')  
The configured [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')\.

### Remarks
The registered services include:
\- A typed HTTP client \([SecureHttpFetcher](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Features.SecureHttpFetch.SecureHttpFetcher 'Abblix\.Oidc\.Server\.Features\.SecureHttpFetch\.SecureHttpFetcher')\) for making secure HTTP requests
\- A custom message handler \([SsrfValidatingHttpMessageHandler](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Features.SecureHttpFetch.SsrfValidatingHttpMessageHandler 'Abblix\.Oidc\.Server\.Features\.SecureHttpFetch\.SsrfValidatingHttpMessageHandler')\) that provides comprehensive SSRF protection

The SSRF protection includes:
\- Blocking requests to internal hostnames \(localhost, internal, etc\.\)
\- Blocking requests to internal TLDs \(\.local, \.internal, etc\.\)
\- DNS resolution and blocking of private/reserved IP address ranges
\- Re\-validation of DNS before HTTP request to prevent DNS rebinding attacks \(TOCTOU\)
\- HTTP redirect disabling to prevent redirect\-based SSRF bypass
\- Response size and timeout limits \(configurable via [SecureHttpFetchOptions](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Features.SecureHttpFetch.SecureHttpFetchOptions 'Abblix\.Oidc\.Server\.Features\.SecureHttpFetch\.SecureHttpFetchOptions')\)

The multi\-layered protection strategy follows OWASP SSRF Prevention guidelines and provides
defense\-in\-depth against various SSRF attack vectors including DNS rebinding and redirect\-based bypasses\.

## ServiceCollectionExtensions\.AddSessionManagement\(this IServiceCollection\) Method {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddSessionManagement(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection)}

Adds services related to session management and decorates the authorization request processor within
the specified [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')\.

```csharp
public static Microsoft.Extensions.DependencyInjection.IServiceCollection AddSessionManagement(this Microsoft.Extensions.DependencyInjection.IServiceCollection services);
```
#### Parameters

###### `services` [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddSessionManagement(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection).services}

#### Returns
[Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')

## ServiceCollectionExtensions\.AddStorages\(this IServiceCollection\) Method {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddStorages(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection)}

Registers services for various storage functionalities related to the OAuth 2\.0 and OpenID Connect flows within
the application\. This method configures essential storage services that manage authorization codes and
authorization requests, ensuring their persistence and accessibility across the application\.

```csharp
public static Microsoft.Extensions.DependencyInjection.IServiceCollection AddStorages(this Microsoft.Extensions.DependencyInjection.IServiceCollection services);
```
#### Parameters

###### `services` [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddStorages(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection).services}

The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') to which the storage services will be added\.
            This collection is crucial for configuring dependency injection in ASP\.NET Core applications, allowing services
            to be added, managed, and retrieved throughout the application lifecycle\.

#### Returns
[Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')  
The modified [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') after adding the storage services, permitting additional
            configurations to be chained\.

## ServiceCollectionExtensions\.AddTokenRevocation\(this IServiceCollection\) Method {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddTokenRevocation(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection)}

Decorates the JSON Web Token validator service with a token status validator to support token revocation
within the specified [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')\.

```csharp
public static Microsoft.Extensions.DependencyInjection.IServiceCollection AddTokenRevocation(this Microsoft.Extensions.DependencyInjection.IServiceCollection services);
```
#### Parameters

###### `services` [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddTokenRevocation(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection).services}

The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') to add token revocation support to\.

#### Returns
[Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')  
The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') for chaining further service registrations\.

### Remarks
This method enhances the application's security by decorating the [IJsonWebTokenValidator](https://www.abblix.com/en/docs/api/abblix-jwt/Abblix.Jwt.IJsonWebTokenValidator 'Abblix\.Jwt\.IJsonWebTokenValidator') service
with [TokenStatusValidatorDecorator](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Features.Tokens.Revocation.TokenStatusValidatorDecorator 'Abblix\.Oidc\.Server\.Features\.Tokens\.Revocation\.TokenStatusValidatorDecorator')\.
This decoration adds the capability to check the revocation status of tokens, allowing the application to reject
tokens that have been revoked\. This is crucial for maintaining the integrity and security of the application's
authentication system, particularly in response to security incidents or user logout events\.

## ServiceCollectionExtensions\.AddTokenServices\(this IServiceCollection\) Method {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddTokenServices(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection)}

Configures token services including token creation, authentication, client\-specific JWT handling, and
token revocation within the specified [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')\.

```csharp
public static Microsoft.Extensions.DependencyInjection.IServiceCollection AddTokenServices(this Microsoft.Extensions.DependencyInjection.IServiceCollection services);
```
#### Parameters

###### `services` [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddTokenServices(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection).services}

The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') to configure with token\-related services\.

#### Returns
[Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')  
The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') so that additional calls can be chained\.

### Remarks
This method aggregates the setup of multiple services related to tokens, enhancing the application's security
infrastructure by providing comprehensive support for JWT \(JSON Web Tokens\) and token lifecycle management\.

It includes the configuration of:
\- General token services for managing the creation and validation of tokens\.
\- Authentication services that leverage JWT for securing user authentication processes\.
\- Client JWT services, tailored for handling JWTs in client\-specific contexts\.
\- Token revocation services to facilitate the process of invalidating tokens when necessary,
such as during logout or when a security breach is detected\.

The integration of these services ensures a robust and scalable approach to handling tokens,
which are critical for secure communication and access control within modern web applications\.

## ServiceCollectionExtensions\.AddUserInfo\(this IServiceCollection\) Method {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddUserInfo(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection)}

Registers services related to user claims management into the provided [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')\.
This method sets up essential services required for processing and handling user claims based on authentication
sessions and authorization requests, facilitating the integration of user\-specific data into tokens or responses\.

```csharp
public static Microsoft.Extensions.DependencyInjection.IServiceCollection AddUserInfo(this Microsoft.Extensions.DependencyInjection.IServiceCollection services);
```
#### Parameters

###### `services` [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') {#Abblix.Oidc.Server.Features.ServiceCollectionExtensions.AddUserInfo(thisMicrosoft.Extensions.DependencyInjection.IServiceCollection).services}

The [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') to which the user claims provider services will be
            added\. This collection is a mechanism for adding and retrieving dependencies in \.NET applications, often used
            to configure dependency injection in ASP\.NET Core applications\.

#### Returns
[Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection')  
The updated [Microsoft\.Extensions\.DependencyInjection\.IServiceCollection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection 'Microsoft\.Extensions\.DependencyInjection\.IServiceCollection') after adding the services, allowing for further
            modifications and additions to be chained\.