code: public QYResultType create(QYUser user){
          BeanUtil.requireNonNull(user, "user is null");
          String url = BASE_API_URL + "cgi-bin/user/create?access_token=#";
          BaseResponse response = executePost(url, user.toJsonString());
          return QYResultType.get(response.getErrcode());
      }
docs: 创建一个新用户
  @param user 用户
  @return 创建结果