public async Task CreateBasicOrderAsync(string userId, ShoppingCart shoppingCart, Address shippingAddress, Address billingAddress, PaymentMethod paymentMethod)
{
var basicShippingMethod = await _shippingMethodService.GetBasicShippingMethodAsync();
_currentOrder = await CreateOrderAsync(userId, shoppingCart, shippingAddress, billingAddress, paymentMethod, basicShippingMethod);
_sessionStateService.SessionState[OrderKey] = _currentOrder;
}