public async Task <OperationResult <IEnumerable <FlashSaleModel> > > SelectSecondKillTodayDataAsync(int activityType, DateTime?scheduleDate = null, bool needProducts = true, bool excludeProductTags = false) => OperationResult.FromResult(await FlashSaleManager.SelectSecondKillTodayDataAsync(activityType, scheduleDate, needProducts, excludeProductTags));