import Morphik from 'morphik';

const client = new Morphik({
  apiKey: 'My API Key',
});

const response = await client.folders.documents.add('document_id', {
  folder_id_or_name: 'folder_id_or_name',
});

console.log(response.message);

{
  "status": "<string>",
  "message": "<string>"
}