public static string ImportCars(CarDealerContext context, string inputJson)
        {
            var carsJsonDto = JsonConvert.DeserializeObject<List<CarJsonDto>>(inputJson);

            var config = new MapperConfiguration(cfg =>
            {
                cfg.CreateMap<CarJsonDto, Car>();
            });
            var mapper = config.CreateMapper();

            foreach (var carJsonDto in carsJsonDto)
            {
                var car = mapper.Map<Car>(carJsonDto);

                context.Cars.Add(car);
            }

            context.SaveChanges();

            for (int i = 0; i < carsJsonDto.Count; i++)
            {
                foreach (var partId in carsJsonDto[i].PartsId.Distinct())
                {
                    context.PartCars.Add(new PartCar() { CarId = i + 1, PartId = partId });
                }
            }

            context.SaveChanges();

            return $"Successfully imported {carsJsonDto.Count}.";
        }