import Courier from '@trycourier/courier';

const client = new Courier({
  apiKey: process.env['COURIER_API_KEY'], // This is the default and can be omitted
});

const lists = await client.lists.list();

console.log(lists.items);

{
  "paging": {
    "more": true,
    "cursor": "<string>"
  },
  "items": [
    {
      "id": "<string>",
      "name": "<string>",
      "created": "<string>",
      "updated": "<string>"
    }
  ]
}