OptionalconversationCard token from the stored card list
OptionalcurrencyOptionalcvvCVV, when the stored card requires it (require_cvv = 1)
OptionalfailRedirect URL on failure (defaults to callbackUrl)
OptionalinstallmentUser token returned in the first successful payment's notification
Payment with a stored card (Kart Saklama). Requires the feature to be enabled on the PayTR account.