docs: public OpenUser userInfo(String accessToken, String openId, String lang) {
          String url = WxEndpoint.get("url.oauth.userinfo.get");
          String formatUrl = String.format(url, accessToken, openId, lang);
  
          logger.debug("get user info {}", formatUrl);
          String response = wxClient.get(formatUrl, false);
          return JsonMapper.defaultMapper().fromJson(response, OpenUser.class);
      }