import SGPClient from 'sgp';

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

const file = await client.beta.files.retrieve('file_id');

console.log(file.id);

{
  "id": "<string>",
  "object": "file",
  "size": 123,
  "md5_checksum": "<string>",
  "filename": "<string>",
  "mime_type": "<string>",
  "tags": {},
  "created_at": "2023-11-07T05:31:56Z",
  "created_by": {
    "id": "<string>",
    "object": "identity",
    "type": "user"
  }
}