public async Task <Result <Exception, Guid> > Handle(CreateCommand request, CancellationToken cancellationToken) { var entity = _mapper.Map <Scheduling>(request); foreach (var serviceProvidedId in request.ProvidedServices) { var providedServiceCallback = await _providedServiceRepository.GetByIdAsync(serviceProvidedId); if (providedServiceCallback.IsSuccess) { entity.ProvidedServices.Add(providedServiceCallback.Success); } } var employeeCallback = await _employeeRepository.GetByIdAsync(request.EmployeeId); if (employeeCallback.IsFailure) { return(new Exception()); } var entityCreated = await _repository.CreateAsync(entity); if (entityCreated.IsFailure) { return(entityCreated.Failure); } return(entityCreated.Success.Id); }