AppEngineTokenSource returns a token source that fetches tokens issued to the current App Engine application's service account.

ComputeTokenSource returns a token source that fetches access tokens from Google Compute Engine (GCE)'s metadata server.

ConfigFromJSON uses a Google Developers Console client_credentials.json file to construct a config.

DefaultClient returns an HTTP Client that uses the DefaultTokenSource to obtain authentication credentials.

DefaultTokenSource returns the token source for "Application Default Credentials".

FindDefaultCredentials searches for "Application Default Credentials".

JWTAccessTokenSourceFromJSON uses a Google Developers service account JSON key file to read the credentials that authorize and authenticate the requests, and returns a TokenSource that does not use any OAuth2 flow but instead creates a JWT and sends that as the access token.

JWTConfigFromJSON uses a Google Developers service account JSON key file to read the credentials that authorize and authenticate the requests.

NewSDKConfig creates an SDKConfig for the given Google Cloud SDK account.

JWTTokenURL is Google's OAuth 2.0 token URL to use with the JWT flow.

Endpoint is Google's OAuth 2.0 endpoint.

DefaultCredentials holds "Application Default Credentials".

An SDKConfig provides access to tokens from an account already authorized via the Google Cloud SDK.