Class UserCredential (1.50.0)

public class UserCredential : object, IGoogleCredential, ICredential, IConfigurableHttpClientInitializer, ITokenAccessWithHeaders, ITokenAccess, IHttpExecuteInterceptor, IHttpUnsuccessfulResponseHandler

OAuth 2.0 credential for accessing protected resources using an access token, as well as optionally refreshing the access token when it expires using a refresh token.

Inheritance

Object > UserCredential

Implements

ICredential, IConfigurableHttpClientInitializer, ITokenAccessWithHeaders, ITokenAccess, IHttpExecuteInterceptor, IHttpUnsuccessfulResponseHandler

Namespace

Google.Apis.Auth.OAuth2

Assembly

Google.Apis.Auth.dll

Constructors

UserCredential(IAuthorizationCodeFlow, String, TokenResponse)

public UserCredential(IAuthorizationCodeFlow flow, string userId, TokenResponse token)

Constructs a new credential instance.

Parameters
Name	Description
`flow`	`IAuthorizationCodeFlow` Authorization code flow.
`userId`	`String` User identifier.
`token`	`TokenResponse` An initial token for the user.

UserCredential(IAuthorizationCodeFlow, String, TokenResponse, String)

public UserCredential(IAuthorizationCodeFlow flow, string userId, TokenResponse token, string quotaProjectId)

Constructs a new credential instance.

Parameters
Name	Description
`flow`	`IAuthorizationCodeFlow` Authorization code flow.
`userId`	`String` User identifier.
`token`	`TokenResponse` An initial token for the user.
`quotaProjectId`	`String` The ID of the project associated to this credential for the purposes of quota calculation and billing. Can be null.

Fields

Logger

protected static readonly ILogger Logger

Logger for this class.

Field Value
Type	Description
`ILogger`

Properties

Flow

public IAuthorizationCodeFlow Flow { get; }

Gets the authorization code flow.

Property Value
Type	Description
`IAuthorizationCodeFlow`

QuotaProject

public string QuotaProject { get; }

Property Value
Type	Description
`String`

Token

public TokenResponse Token { get; set; }

Gets or sets the token response which contains the access token.

Property Value
Type	Description
`TokenResponse`

UserId

public string UserId { get; }

Gets the user identity.

Property Value
Type	Description
`String`

Methods

GetAccessTokenForRequestAsync(String, CancellationToken)

public virtual Task<string> GetAccessTokenForRequestAsync(string authUri = null, CancellationToken cancellationToken = null)

Gets an access token to authorize a request. Implementations should handle automatic refreshes of the token if they are supported. The authUri might be required by some credential types (e.g. the JWT access token) while other credential types migth just ignore it.

Parameters
Name	Description
`authUri`	`String` The URI the returned token will grant access to.
`cancellationToken`	`CancellationToken` The cancellation token.

Returns
Type	Description
`Task<String>`	The access token.

GetAccessTokenWithHeadersForRequestAsync(String, CancellationToken)

public Task<AccessTokenWithHeaders> GetAccessTokenWithHeadersForRequestAsync(string authUri = null, CancellationToken cancellationToken = null)

Gets an access token to authorize a request. The token might be accompanied by extra information that should be sent in the form of headers. Implementations should handle automatic refreshes of the token if they are supported. The authUri might be required by some credential types (e.g. the JWT access token) while other credential types migth just ignore it.

Parameters
Name	Description
`authUri`	`String` The URI the returned token will grant access to.
`cancellationToken`	`CancellationToken` The cancellation token.

Returns
Type	Description
`Task<AccessTokenWithHeaders>`	The access token with headers if any.

HandleResponseAsync(HandleUnsuccessfulResponseArgs)

public Task<bool> HandleResponseAsync(HandleUnsuccessfulResponseArgs args)

Parameter
Name	Description
`args`	`HandleUnsuccessfulResponseArgs`

Returns
Type	Description
`Task<Boolean>`

Initialize(ConfigurableHttpClient)

public void Initialize(ConfigurableHttpClient httpClient)

Initializes a HTTP client after it was created.

Parameter
Name	Description
`httpClient`	`ConfigurableHttpClient`

InterceptAsync(HttpRequestMessage, CancellationToken)

public Task InterceptAsync(HttpRequestMessage request, CancellationToken taskCancellationToken)

Default implementation is to try to refresh the access token if there is no access token or if we are 1 minute away from expiration. If token server is unavailable, it will try to use the access token even if has expired. If successful, it will call Intercept(HttpRequestMessage, String).

Parameters
Name	Description
`request`	`HttpRequestMessage`
`taskCancellationToken`	`CancellationToken`

Returns
Type	Description
`Task`

RefreshTokenAsync(CancellationToken)

public Task<bool> RefreshTokenAsync(CancellationToken taskCancellationToken)

Refreshes the token by calling to RefreshTokenAsync(String, String, CancellationToken). Then it updates the TokenResponse with the new token instance.

Parameter
Name	Description
`taskCancellationToken`	`CancellationToken` Cancellation token to cancel an operation.

Returns
Type	Description
`Task<Boolean>`	`true` if the token was refreshed.

RevokeTokenAsync(CancellationToken)

public Task<bool> RevokeTokenAsync(CancellationToken taskCancellationToken)

Asynchronously revokes the token by calling RevokeTokenAsync(String, String, CancellationToken).

Parameter
Name	Description
`taskCancellationToken`	`CancellationToken` Cancellation token to cancel an operation.

Returns
Type	Description
`Task<Boolean>`	`true` if the token was revoked successfully.

Extension Method

Utilities.ThrowIfNull<T>(T, String)