We have a payment workflow where we want to create a new or use an existing customer (using V3 endpoint) and the customer can choose to save their payment information.
How do you add the iframe generated token to an existing V3 customer? The API requires "first 6" and "last 4" in order to save a source but that information is not available.
We can't use the Ctoken first to get the data because the Ctoken would no longer be valid if saved after use.