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

fetch('https://api.phaseo.app/v1/files/{file_id}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "id": "<string>",
  "object": "<string>",
  "bytes": 123,
  "created_at": 123,
  "filename": "<string>",
  "purpose": "<string>",
  "status": "<string>",
  "status_details": {}
}