/// <summary>
 /// 拒绝当前申请
 /// </summary>
 /// <param name="reason">原因</param>
 public async ValueTask Reject(string reason = null)
 {
     await SoraApi.SetGroupAddRequest(RequestFlag, SubType, false, reason);
 }
 /// <summary>
 /// 同意当前申请
 /// </summary>
 public async ValueTask Accept()
 {
     await SoraApi.SetGroupAddRequest(RequestFlag, SubType, true);
 }