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

## PasswordGrantHandler Class

Handles the authorization process for the password grant type within the OAuth 2\.0 framework\.
This handler validates the user's credentials and processes token requests based on the password grant type\.
The password grant type allows clients to directly exchange a user's credentials \(username and password\)
for an access token, typically for trusted clients\.

```csharp
public class PasswordGrantHandler : Abblix.Oidc.Server.Endpoints.Token.Grants.IAuthorizationGrantHandler, Abblix.Oidc.Server.Common.Interfaces.IGrantTypeInformer
```

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

Implements [IAuthorizationGrantHandler](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Endpoints.Token.Grants.IAuthorizationGrantHandler 'Abblix\.Oidc\.Server\.Endpoints\.Token\.Grants\.IAuthorizationGrantHandler'), [IGrantTypeInformer](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Common.Interfaces.IGrantTypeInformer 'Abblix\.Oidc\.Server\.Common\.Interfaces\.IGrantTypeInformer')
### Constructors

## PasswordGrantHandler\(IUserCredentialsAuthenticator\) Constructor {#Abblix.Oidc.Server.Endpoints.Token.Grants.PasswordGrantHandler.PasswordGrantHandler(Abblix.Oidc.Server.Common.Interfaces.IUserCredentialsAuthenticator)}

Handles the authorization process for the password grant type within the OAuth 2\.0 framework\.
This handler validates the user's credentials and processes token requests based on the password grant type\.
The password grant type allows clients to directly exchange a user's credentials \(username and password\)
for an access token, typically for trusted clients\.

```csharp
public PasswordGrantHandler(Abblix.Oidc.Server.Common.Interfaces.IUserCredentialsAuthenticator userCredentialsAuthenticator);
```
#### Parameters

###### `userCredentialsAuthenticator` [IUserCredentialsAuthenticator](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Common.Interfaces.IUserCredentialsAuthenticator 'Abblix\.Oidc\.Server\.Common\.Interfaces\.IUserCredentialsAuthenticator') {#Abblix.Oidc.Server.Endpoints.Token.Grants.PasswordGrantHandler.PasswordGrantHandler(Abblix.Oidc.Server.Common.Interfaces.IUserCredentialsAuthenticator).userCredentialsAuthenticator}

A service for authenticating the user's credentials\.
### Properties

## PasswordGrantHandler\.GrantTypesSupported Property {#Abblix.Oidc.Server.Endpoints.Token.Grants.PasswordGrantHandler.GrantTypesSupported}

Specifies the grant type that this handler supports, which is the "password" grant type\.
This ensures that this handler is only invoked when processing requests with the password grant type\.

```csharp
public System.Collections.Generic.IEnumerable<string> GrantTypesSupported { get; }
```

Implements [GrantTypesSupported](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Common.Interfaces.IGrantTypeInformer#Abblix.Oidc.Server.Common.Interfaces.IGrantTypeInformer.GrantTypesSupported 'Abblix\.Oidc\.Server\.Common\.Interfaces\.IGrantTypeInformer\.GrantTypesSupported')

#### Property Value
[System\.Collections\.Generic\.IEnumerable&lt;](https://learn.microsoft.com/en-us/dotnet/api/system.collections.generic.ienumerable-1 'System\.Collections\.Generic\.IEnumerable\`1')[System\.String](https://learn.microsoft.com/en-us/dotnet/api/system.string 'System\.String')[&gt;](https://learn.microsoft.com/en-us/dotnet/api/system.collections.generic.ienumerable-1 'System\.Collections\.Generic\.IEnumerable\`1')
### Methods

## PasswordGrantHandler\.AuthorizeAsync\(TokenRequest, ClientInfo\) Method {#Abblix.Oidc.Server.Endpoints.Token.Grants.PasswordGrantHandler.AuthorizeAsync(Abblix.Oidc.Server.Model.TokenRequest,Abblix.Oidc.Server.Features.ClientInformation.ClientInfo)}

Asynchronously processes the token request using the password grant type\.
The handler ensures the request contains the necessary parameters, validates the user's credentials,
and then proceeds to authorize the request if the credentials are valid\.
It delegates credential validation to the user credentials authenticator, which handles the security
checks related to user authentication\.

```csharp
public System.Threading.Tasks.Task<Abblix.Utils.Result<Abblix.Oidc.Server.Endpoints.Token.Interfaces.AuthorizedGrant,Abblix.Oidc.Server.Common.OidcError>> AuthorizeAsync(Abblix.Oidc.Server.Model.TokenRequest request, Abblix.Oidc.Server.Features.ClientInformation.ClientInfo clientInfo);
```
#### Parameters

###### `request` [TokenRequest](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Model.TokenRequest 'Abblix\.Oidc\.Server\.Model\.TokenRequest') {#Abblix.Oidc.Server.Endpoints.Token.Grants.PasswordGrantHandler.AuthorizeAsync(Abblix.Oidc.Server.Model.TokenRequest,Abblix.Oidc.Server.Features.ClientInformation.ClientInfo).request}

The token request containing the user's credentials and other parameters\.

###### `clientInfo` [ClientInfo](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Features.ClientInformation.ClientInfo 'Abblix\.Oidc\.Server\.Features\.ClientInformation\.ClientInfo') {#Abblix.Oidc.Server.Endpoints.Token.Grants.PasswordGrantHandler.AuthorizeAsync(Abblix.Oidc.Server.Model.TokenRequest,Abblix.Oidc.Server.Features.ClientInformation.ClientInfo).clientInfo}

Information about the client making the request, used for validation and context\.

Implements [AuthorizeAsync\(TokenRequest, ClientInfo\)](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Endpoints.Token.Grants.IAuthorizationGrantHandler#Abblix.Oidc.Server.Endpoints.Token.Grants.IAuthorizationGrantHandler.AuthorizeAsync(Abblix.Oidc.Server.Model.TokenRequest,Abblix.Oidc.Server.Features.ClientInformation.ClientInfo) 'Abblix\.Oidc\.Server\.Endpoints\.Token\.Grants\.IAuthorizationGrantHandler\.AuthorizeAsync\(Abblix\.Oidc\.Server\.Model\.TokenRequest, Abblix\.Oidc\.Server\.Features\.ClientInformation\.ClientInfo\)')

#### Returns
[System\.Threading\.Tasks\.Task&lt;](https://learn.microsoft.com/en-us/dotnet/api/system.threading.tasks.task-1 'System\.Threading\.Tasks\.Task\`1')[Abblix\.Utils\.Result&lt;](https://learn.microsoft.com/en-us/dotnet/api/abblix.utils.result-2 'Abblix\.Utils\.Result\`2')[AuthorizedGrant](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Endpoints.Token.Interfaces.AuthorizedGrant 'Abblix\.Oidc\.Server\.Endpoints\.Token\.Interfaces\.AuthorizedGrant')[,](https://learn.microsoft.com/en-us/dotnet/api/abblix.utils.result-2 'Abblix\.Utils\.Result\`2')[OidcError](https://www.abblix.com/en/docs/api/abblix-oidc-server/Abblix.Oidc.Server.Common.OidcError 'Abblix\.Oidc\.Server\.Common\.OidcError')[&gt;](https://learn.microsoft.com/en-us/dotnet/api/abblix.utils.result-2 'Abblix\.Utils\.Result\`2')[&gt;](https://learn.microsoft.com/en-us/dotnet/api/system.threading.tasks.task-1 'System\.Threading\.Tasks\.Task\`1')  
A task that completes with the authorization result, which could be an error or successful grant\.