import Courier from '@trycourier/courier';

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

const subscriptions = await client.lists.subscriptions.list('list_id');

console.log(subscriptions.items);

{
  "paging": {
    "more": true,
    "cursor": "<string>"
  },
  "items": [
    {
      "recipientId": "<string>",
      "created": "<string>",
      "preferences": {
        "categories": {},
        "notifications": {}
      }
    }
  ]
}