docs: public void move(List<String> openIds, int group) {
          String url = WxEndpoint.get("url.group.user.moves");
          Map<String, Object> request = new HashMap<>();
          request.put("openid_list", openIds);
          request.put("to_groupid", group);
  
          String json = JsonMapper.defaultMapper().toJson(request);
          logger.debug("move users group: {}", json);
          wxClient.post(url, json);
      }