public async Task <ActionResult <ApiResponse> > BuyNewAppartamentAsync(User user, int appartamentId) { ResultWithMessage result = await _buildingService.BuyAppartamentsAsync(user, appartamentId); if (result.IsSuccess) { return(new OkObjectResult(new ApiResponse(200, result.Message))); } return(new BadRequestObjectResult(new ApiResponse(400, result.Message))); }