List files in portal

const response = await fetch('https://studio.edgeimpulse.com/v1/api/portals/{portalId}/files', {
    method: 'POST',
    headers: {
      "Content-Type": "application/json"
    },
    body: JSON.stringify({
      "prefix": "text"
    }),
});
const data = await response.json();

{
  "success": false,
  "error": "text",
  "files": [
    {
      "name": "text",
      "addedDate": "2019-07-21T17:32:28Z",
      "size": 0,
      "ETag": "text",
      "path": "text",
      "type": "folder"
    }
  ],
  "continuationToken": "text"
}