/// <summary> /// 收到 "本月已發送訊息數" 後會回覆的文字 /// </summary> /// <returns></returns> private async Task <string> GetNumberOfMessagesSentThisMonthTips() { string result = ""; NumberOfMessagesSentThisMonthResponseModel responseModel = new NumberOfMessagesSentThisMonthResponseModel(); responseModel = await _lineClient.GetNumberOfMessagesSentThisMonthAsync(); result = $"本月已發送訊息的數量為 : {responseModel.totalUsage}"; return(result); }