const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({returnUrl: '<string>', refreshUrl: '<string>'})
};

fetch('https://api.dolfinai.co/organisations/{id}/payment-account/link', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "url": "<string>",
  "expiresAt": "2023-11-07T05:31:56Z"
}