code: public GetUsersResponse getUsers(String nextOpenid) {
          GetUsersResponse response;
          LOG.debug("获取关注者列表.....");
          String url = BASE_API_URL + "cgi-bin/user/get?access_token=#";
          if (StrUtil.isNotBlank(nextOpenid)) {
              url += "&next_openid=" + nextOpenid;
          }
          BaseResponse r = executeGet(url);
          String resultJson = isSuccess(r.getErrcode()) ? r.getErrmsg() : r.toJsonString();
          response = JSONUtil.toBean(resultJson, GetUsersResponse.class);
          return response;
      }
docs: 获取关注者列表
  
  @param nextOpenid 下一个用户的ID
  @return 关注者列表对象