const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};

fetch('https://api.paddle.com/customers/{customer_id}/payment-methods/{payment_method_id}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "data": {
    "customer_id": "ctm_01hv6y1jedq4p1n0yqn5ba3ky4",
    "address_id": "add_01j2jfab8zcjy524w6e4s1knjy",
    "id": "paymtd_01j2jff1m3es31sdkejpaym164",
    "type": "card",
    "card": {
      "cardholder_name": "Sam Miller",
      "type": "visa",
      "last4": "4242",
      "expiry_month": 5,
      "expiry_year": 2025
    },
    "paypal": null,
    "origin": "saved_during_purchase",
    "saved_at": "2024-07-12T03:23:26Z",
    "updated_at": "2024-10-29T14:12:28.018784Z"
  },
  "meta": {
    "request_id": "03dae283-b7e9-47dc-b8c0-229576d90139"
  }
}