import Whop from '@whop/sdk';

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

const courseChapter = await client.courseChapters.retrieve('chap_xxxxxxxxxxxxx');

console.log(courseChapter.id);

{
  "id": "chap_xxxxxxxxxxxxx",
  "title": "<string>",
  "order": 42,
  "lessons": [
    {
      "id": "lesn_xxxxxxxxxxxxx",
      "title": "<string>",
      "order": 42
    }
  ]
}