public Card GetCard()
 {
     return(new Card
     {
         Id = Ibentificator <Card> .GetId(),
         Bank = GetBankName(),
         CVC = GetCvc(),
         Duration = GetDurationType(),
         ExpiredDate = GetExprideDate(),
         CardType = GetCardType(),
         CardNumber = GetCardNumber(),
         CardHolder = $"{_user.name} {_user.Surname}",
         CardHolderId = _user.Id
     });
 }
        private void Button2_Click(object sender, EventArgs e)
        {
            string
                email    = textBox1.Text,
                password = textBox2.Text;

            if (dbContext.Users.FindItem(u => u.Email == email) == null)
            {
                User user = new User {
                    Id = Ibentificator <User> .GetId(), Email = email, Password = password, userType = UserType.User
                };
                dbContext.Users.Add(user);
                MessageBox.Show("You successfully registered!");
            }
            else
            {
                MessageBox.Show("this user already exists!");
            }
        }