This API call will either create or modify a card in the customer's vault. If the cardToken is present, the API will retrieve the card for it to be modify. If blank, a new card will be added on file.
Full Card Numbers Are Restricted
Please note that this request requires you to send full card number, which is restricted to most merchants without requesting an exception. Instead, we recommend using Helcim.js to verify and tokenize full card numbers.