def METHOD_NAME(self, mount_point=DEFAULT_MOUNT_POINT):
    """
    List existing users that have been created in the auth method
    Supported methods:
        LIST: /auth/{mount_point}/users. Produces: 200 application/json
    :param mount_point: The "path" the method/backend was mounted on.
    :type mount_point: str | unicode
    :return: The JSON response of the list_groups request.
    :rtype: dict
    """
    api_path = f"/v1/auth/{mount_point}/users"
    return self._adapter.list(
        url=api_path,
    )