const url = 'https://api.thanks.io/api/v2/sub-accounts/';
const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}, body: undefined};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}

{
  "data": [
    {
      "summary": "Example Sub Account",
      "value": {
        "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": "[email protected]",
          "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"
      }
    }
  ]
}