Creates an instance of CallCredentials that will use given access token to authenticate with a gRPC service.

Retrieves an instance of Google's Application Default Credentials using GoogleCredential.GetApplicationDefaultAsync() and converts them into a gRPC ChannelCredentials that use the default SSL credentials.

Converts a ITokenAccess (e.g. GoogleCredential) object into a gRPC CallCredentials object.

Converts a ITokenAccess (e.g. GoogleCredential) object into a gRPC ChannelCredentials object. Default SSL credentials are used.