post https://cp.gazoop.com/public_api/update_credit_card.json
Update or Add a Credit Card to a Customers account.
PCI Compliance
In order to be able to take advantage of this API you must have this feature turned on by iWebCab Tech Support after providing a PCI Compliance certificate. If, however, you are using a mobile app and connecting to us directly using HTTPS a PCI Compliance certificate is not required.