import Courier from '@trycourier/courier';

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

const response = await client.audiences.listMembers('audience_id');

console.log(response.items);

{
  "paging": {
    "more": true,
    "cursor": "<string>"
  },
  "items": [
    {
      "added_at": "<string>",
      "audience_id": "<string>",
      "audience_version": 123,
      "member_id": "<string>",
      "reason": "<string>"
    }
  ]
}