def get_token_status(token, serializer, max_age=None, return_data=False):
    """Get the status of a token.

    :param token: The token to check
    :param serializer: The name of the seriailzer. Can be one of the
                       following: ``confirm``, ``login``, ``reset``
    :param max_age: The name of the max age config option. Can be on of
                    the following: ``CONFIRM_EMAIL``, ``LOGIN``, ``RESET_PASSWORD``
    """
    serializer = getattr(_security, serializer + '_serializer')
    max_age = get_max_age(max_age)
    user, data = None, None
    expired, invalid = False, False

    try:
        data = serializer.loads(token, max_age=max_age)
    except SignatureExpired:
        d, data = serializer.loads_unsafe(token)
        expired = True
    except (BadSignature, TypeError, __HOLE__):
        invalid = True

    if data:
        user = _datastore.find_user(id=data[0])

    expired = expired and (user is not None)

    if return_data:
        return expired, invalid, user, data
    else:
        return expired, invalid, user
dataset/ETHPy150Open mattupstate/flask-security/flask_security/utils.py/get_token_status