/// <summary>
        ///
        /// </summary>
        /// <param name="userid"></param>
        /// <param name="info"></param>
        /// <returns></returns>
        public async Task <dynamic> ChangeIntroduction(long userid, DTOAPI_ChangeIntroduction info)
        {
            if (!AccountValidator.bValidIntroduction(info.introduction))
            {
                throw new Exception("简介不符合规则");
            }

            await this.publishEndpoint.Publish(new ChangeAccountIntroductionCommand
            {
                id           = userid,
                introduction = info.introduction
            });

            return("");
        }