human
Complete the below
def make_get_default_gcs_bucket_name_call(rpc):

    ''''Get default google storage bucket name for the app.
    Args:
    rpc: A UserRPC object.
    Returns:
    Default Google Storage Bucket name of the app.'
    '''
assistant
#Here is the Python program you requested.
    request = app_identity_service_pb.GetDefaultGcsBucketNameRequest()
    response = app_identity_service_pb.GetDefaultGcsBucketNameResponse()
    if (rpc.deadline is not None):
        request.set_deadline(rpc.deadline)
    def get_default_gcs_bucket_name_result(rpc):
        "Check    success,    handle    exceptions,    and    return    converted    RPC    result.\n\n                This    method    waits    for    the    RPC    if    it    has    not    yet    finished,    and    calls    the\n                post-call    hooks    on    the    first    invocation.\n\n                Args:\n                        rpc:    A    UserRPC    object.\n\n                Returns:\n                        A    string    which    is    the    name    of    the    app's    default    google    storage    bucket.\n                "
        assert (rpc.service == _APP_IDENTITY_SERVICE_NAME), repr(rpc.service)
        assert (rpc.method == _GET_DEFAULT_GCS_BUCKET_NAME_METHOD_NAME), repr(rpc.method)
        try:
            rpc.check_success()
        except apiproxy_errors.ApplicationError as err:
            raise _to_app_identity_error(err)
        return (response.default_gcs_bucket_name() or None)
    rpc.make_call(_GET_DEFAULT_GCS_BUCKET_NAME_METHOD_NAME, request, response, get_default_gcs_bucket_name_result)