private void DeleteCustomer()
        {
            bool flag2  = true;
            int  choice = 0;

            while (flag2)
            {
                Console.WriteLine("Please select the customer to delete: ");
                choice = Convert.ToInt32(Console.ReadLine());
                var list = _customerManager.GetAll().Data;
                if (!list.Any(x => x.UserID == choice))
                {
                    Console.WriteLine(Messages.NotExist + "customer");
                }
                else
                {
                    flag2 = false;
                }
            }
            _customerManager.GetList(_customerManager.GetAll().Data);
            _customerManager.Delete(_customerManager.FindByID(choice).Data);
            Console.WriteLine("Customer" + Messages.DeleteSingular);
        }