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

fetch('https://api.thanks.io/api/v2/order/{order_id}/cancel', options)
  .then(response => response.json())
  .then(response => console.log(response))
  .catch(err => console.error(err));

{
  "order": {
    "id": 37294,
    "user_id": 2,
    "sub_account_id": 66,
    "type": "postcard",
    "message": "Dear %FIRST_NAME%\r\n\r\nHope all is well\n\n-John Doe",
    "message_template_id": null,
    "style": 4,
    "handwriting_color": null,
    "size": "6x9",
    "addons": null,
    "envelope_id": null,
    "front_image": "https://s3.amazonaws.com/cdn.thanks.io/user_image_library/1533645532.png",
    "back_image": null,
    "high_quality_preview": null,
    "is_dynamic": 0,
    "append_or_current_resident": 0,
    "dynamic_image_url": null,
    "custom_background_url": null,
    "additional_letter_pages": null,
    "additional_letter_pages_count": 0,
    "giftcard_brand": null,
    "giftcard_image": null,
    "giftcard_amount": null,
    "qrcode_url": null,
    "share_image": null,
    "mailing_lists": null,
    "mailing_list_ids_used": null,
    "campaign_id": null,
    "total_estimated_recipients": 3,
    "sales_tax_total": 0,
    "authorization_total": 267,
    "total_recipients": 0,
    "grand_total": 0,
    "leads_fee": 0,
    "transaction_id": 38080,
    "settled": 1,
    "status": "cancelled",
    "method": "api",
    "email_cc": null,
    "notifications": null,
    "return_name": null,
    "return_address": null,
    "return_address2": null,
    "return_city": null,
    "return_province": null,
    "return_postal_code": null,
    "allow_share": 0,
    "session_id": null,
    "created_at": "2020-04-06 00:20:31",
    "updated_at": "2023-10-04 02:46:14",
    "display_addons": "",
    "display_status": "Cancelled",
    "display_trigger": "API",
    "display_type": "Postcard-6x9",
    "handwriting_image": null,
    "share_url": "https://dashboard.thanks.io/share/order/37294",
    "giftcard_brand_longname": ""
  }
}