public void CheckoutCart(string address, string firstName, string lastName, string city, string country, string phoneNumber, string email)
{
var order = CreateOrder(address, firstName, lastName, city, country, phoneNumber, email);
order = TransformCartToOrder(order);
string userId = _userManager.GetUserId(_httpContextAccessor.HttpContext.User);
User user = _appDbContext.Users.First(u => u.Id == userId);
order.User = user;
_shoppingCartManager.ClearCart();
_appDbContext.SaveChanges();
}