def _create_composite_credentials(
            credentials=None,
            credentials_file=None,
            scopes=None,
            ssl_credentials=None,
            quota_project_id=None):
        """Create the composite credentials for secure channels.

        Args:
            credentials (google.auth.credentials.Credentials): The credentials. If
                not specified, then this function will attempt to ascertain the
                credentials from the environment using :func:`google.auth.default`.
            credentials_file (str): A file with credentials that can be loaded with
                :func:`google.auth.load_credentials_from_file`. This argument is
                mutually exclusive with credentials.
            scopes (Sequence[str]): A optional list of scopes needed for this
                service. These are only used when credentials are not specified and
                are passed to :func:`google.auth.default`.
            ssl_credentials (grpc.ChannelCredentials): Optional SSL channel
                credentials. This can be used to specify different certificates.
            quota_project_id (str): An optional project to use for billing and quota.

        Returns:
            grpc.ChannelCredentials: The composed channel credentials object.

        Raises:
            google.api_core.DuplicateCredentialArgs: If both a credentials object and credentials_file are passed.
        """
        if credentials and credentials_file:
            raise exceptions.DuplicateCredentialArgs(
                "'credentials' and 'credentials_file' are mutually exclusive."
            )

        if credentials_file:
            credentials, _ = google.auth.load_credentials_from_file(credentials_file, scopes=scopes)
        elif credentials:
            credentials = google.auth.credentials.with_scopes_if_required(credentials, scopes)
        else:
            credentials, _ = google.auth.default(scopes=scopes)

        if quota_project_id:
>           credentials = credentials.with_quota_project(quota_project_id)
E           AttributeError: 'AnonymousCredentials' object has no attribute 'with_quota_project'

.nox/unit-3-6/lib/python3.6/site-packages/google/api_core/grpc_helpers.py:220: AttributeError