To unsign a JWT token
    :param token:
    :param kw:
    :return: mixed data

def unsign_jwt(token, secret_key, salt=None, **kw):
    """
    To unsign a JWT token
    :param token:
    :param kw:
    :return: mixed data
    """
    s = itsdangerous.TimedJSONWebSignatureSerializer(secret_key, salt=salt, **kw)
    return s.loads(token)