import Courier from '@trycourier/courier';

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

const audience = await client.audiences.retrieve('audience_id');

console.log(audience.id);

{
  "id": "<string>",
  "name": "<string>",
  "description": "<string>",
  "filter": {
    "operator": "ENDS_WITH",
    "value": "<string>",
    "path": "<string>"
  },
  "created_at": "<string>",
  "updated_at": "<string>"
}