Gets or sets the CreditCardVendor.
This Attribute is required if CreditCard is chosen as PaymentMethod and the customer isn't already created in the database or its ID is unknown. This is usually the case when creating a Reservation with BookingType Direct from outside the sunnycars-Network.
CreateReservationV2Request Class | SunnyCars.Schema.Osi.WsReservation.V4 Namespace