public IActionResult Details(int customerId)
        {
            var customer = _customerService.GetById(customerId);

            if (customer != null)
            {
                var records = _rentedCarsRecordService.GetByUserTC(customer.TC);
                var model   = new CustomerDetailsViewModel {
                    Customer = customer, Records = records
                };
                return(View(model));
            }

            TempData["message"] = "Failed to reach detail page !";
            return(RedirectToAction("Index", "Customer"));
        }