fakes.py

    def __init__(self):
        self.compute = None
        self.identity = None
        self.image = None
        self.object_store = None
        self.volume = None
        self.network = None
        self.session = None
        self.auth_ref = None
        self.auth_plugin_name = None
        self.network_endpoint_enabled = True
        self.compute_endpoint_enabled = True
        self.volume_endpoint_enabled = True
        self.configuration_type = "cloud_config"

    def get_configuration(self):

        config = {
            'region': REGION_NAME,
            'identity_api_version': VERSION,
        }

        if self.configuration_type == "cloud_config":
            config["auth"] = {
                'username': USERNAME,
                'password': PASSWORD,
                'token': AUTH_TOKEN,
            }
        elif self.configuration_type == "global_env":
            config["username"] = USERNAME
            config["password"] = PASSWORD
            config["token"] = AUTH_TOKEN

        return config