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.send.message({
  message: {
    to: { user_id: 'user_id' },
    template: 'template_id',
    data: { foo: 'bar' },
  },
});

console.log(response.requestId);

{
  "requestId": "1-67f340b1-58b7b231d9485ef0cda0a38b"
}