func AddRetrieveErrorToAuthError(err *auth.Error) *auth.Error
AddRetrieveErrorToAuthError returns the same error provided and adds a golang.org/x/oauth2.RetrieveError to the error chain by setting the `Err` field on the cloud.google.com/go/auth.Error.
func AuthCredentialsFromOauth2Credentials(creds *google.Credentials) *auth.Credentials
AuthCredentialsFromOauth2Credentials converts a golang.org/x/oauth2/google.Credentials to a cloud.google.com/go/auth.Credentials.
func AuthErrorFromRetrieveError(err *oauth2.RetrieveError) *auth.Error
AuthErrorFromRetrieveError returns an cloud.google.com/go/auth.Error that wraps the provided golang.org/x/oauth2.RetrieveError.
func Oauth2CredentialsFromAuthCredentials(creds *auth.Credentials) *google.Credentials
Oauth2CredentialsFromAuthCredentials converts a cloud.google.com/go/auth.Credentials to a golang.org/x/oauth2/google.Credentials.
func TokenProviderFromTokenSource(ts oauth2.TokenSource) auth.TokenProvider
TokenProviderFromTokenSource converts any golang.org/x/oauth2.TokenSource into a cloud.google.com/go/auth.TokenProvider.
func TokenSourceFromTokenProvider(tp auth.TokenProvider) oauth2.TokenSource
TokenSourceFromTokenProvider converts any cloud.google.com/go/auth.TokenProvider into a golang.org/x/oauth2.TokenSource.