python 聊天室邀请成员的 899003 是怎们回事

 # data = [{"username": "6930f9d2-8002-11e8-a956-38c98631fcd5"}]
    # jsons = json.dumps(data)
    # reson = jmessage._request("PUT", jsons, "https://api.im.jpush.cn/v1/chatroom/10087440/members")
    # print("==========", reson.json())


{'error': {'code': 899003, 'message': 'parameter invalid!'}}