Gr4vy Payment Methods API
In Gr4vy, a payment method represents a way in which a payment can be processed, for example a card, a PayPal account, or a bank account. The payment method API can be used to: * List all the available payment methods * Filter the available payment method for a buyer in a specific currency and country. * Store (also known as vault) a payment method for a buyer. * Fetch all previously stored payment methods for a buyer.