code: public GetUserInfoResponse getUserInfo(String openid) {
          BeanUtil.requireNonNull(openid, "openid is null");
          GetUserInfoResponse response;
          LOG.debug("获取关注者信息.....");
          String url = BASE_API_URL + "cgi-bin/user/info?access_token=#&lang=zh_CN&openid=" + openid;
          BaseResponse r = executeGet(url);
          String resultJson = isSuccess(r.getErrcode()) ? r.getErrmsg() : r.toJsonString();
          response = JSONUtil.toBean(resultJson, GetUserInfoResponse.class);
          return response;
      }
docs: 获取关注者信息
  
  @param openid 关注者ID
  @return 关注者信息对象