https://developers.weixin.qq.com/doc/offiaccount/User_Management/Get_users_basic_information_UnionID.html

我已经关注测试公众号，为什么拿不到unionID,

拿到的结果是：{
  "country": "",
  "qr_scene": 123123,
  "subscribe": 1,
  "city": "",
  "openid": "ojhbM6aKY4HE7fLGlb7UDK5McwPE",
  "tagid_list": [],
  "sex": 0,
  "groupid": 0,
  "language": "zh_CN",
  "remark": "",
  "subscribe_time": 1691133840,
  "province": "",
  "subscribe_scene": "ADD_SCENE_QR_CODE",
  "nickname": "",
  "headimgurl": "",
  "qr_scene_str": ""
}