export interface PaymentInstrumentCard {
    /** The network identifier (`visa`, `amex`, …), matching `card.networks` entries and saved card payment methods. Null when the vault did not record the network. */
    brand: string | null;
    /** The card's expiry month, 1 to 12. Null when the vault did not record it. */
    exp_month: number | null;
    /** The card's four-digit expiry year. Null when the vault did not record it. */
    exp_year: number | null;
    /** The issuer identification number, also called the BIN: the card's leading six or eight digits, which identify the issuing bank. Null when the processor did not report it. */
    issuer_identification_number: string | null;
    /** The card's last four digits, when captured. */
    last4: string | null;
}