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

fetch('https://api.thanks.io/api/v2/sub-accounts/{subAccountId}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "id": 1,
  "user_id": 2,
  "title": "My New Sub Account",
  "return_name": "John Smith",
  "return_address": "123 Smith Street 11",
  "return_address2": "Apt 1",
  "return_city": "Denver",
  "return_state": "CO",
  "return_postal_code": "12345",
  "message_background_url": null,
  "postcard6x9_background_url": null,
  "notecard_background_url": null,
  "windowedletter_background_url": null,
  "windowlessletter_background_url": null,
  "branding_fields": {
    "accentColor": "#5f01d1",
    "symbol": "",
    "logo": "https://s3.amazonaws.com/content-staging.thanks.io/templates/dynamic-images/5dcb82c0-f258-11ef-9c99-e542d768ea52.png",
    "disclaimer": null,
    "headshot": null,
    "name": "John Gray",
    "email": "test@test.com",
    "phone": "1234567890",
    "company": null,
    "domain": null,
    "set": true,
    "first_name": "John"
  },
  "created_at": "2020-02-14 20:50:02",
  "updated_at": "2025-07-16 19:03:31"
}