Values accepted for Type in the PaymentMethods API.

Prefer the documented atoms returned by values/0. The type also accepts strings so a newer server value can be preserved by an older SDK instead of failing during decoding.

Saves and manages customer-owned payment methods.

A payment method always belongs to its attached customer. Tokenization may start a verification flow; inspect the returned verification state before attempting a charge. The API returns masked or provider-safe details and never returns raw reusable credentials.