public async Task <ActionResult> Add(VehicleModelViewModel model)
        {
            try
            {
                var result = await _modelRepo.GetModelByName(model.Description);

                if (result != null)
                {
                    return(BadRequest("Bilmodellen existerar redan i systemet!"));
                }

                var newModel = new VehicleModel
                {
                    Description = model.Description
                };

                _modelRepo.Add(newModel);
                if (await _modelRepo.SaveAllAsync())
                {
                    return(StatusCode(201, newModel));
                }
                return(StatusCode(500, "Det gick inte att spara ner ny bilmodell"));
            }
            catch (Exception ex)
            {
                return(StatusCode(500, ex.Message));
            }
        }