Obtener método de pago

GET https://api.geopagos.io/api/v1.0/payment-methods/{paymentMethodId}

Response 200

{
  "payment_method_id": "pm_789",
  "customer_id": "cus_456",
  "type": "credit",
  "brand": "visa",
  "last4": "4242",
  "exp_month": 12,
  "exp_year": 2028,
  "holder_name": "Juan Perez",
  "status": "active",
  "created_at": "2026-01-01T00:00:00Z",
  "updated_at": "2026-01-01T00:00:00Z"
}