def authenticate(user=None):  # noqa: E501
    """Authenticate

    Authenticate with the API # noqa: E501

    :param user: The user authentication object.
    :type user: dict | bytes

    :rtype: AuthResponse
    """
    if connexion.request.is_json:
        user = UserAuth.from_dict(connexion.request.get_json())  # noqa: E501
    return 'do some magic!'