const client = new Client({ authCallback, echoMessages: true });

await client.subscribe("test", (data) => console.log(data));

await client.publish("test", "my-event", { message: "Hello!" });

await client.unsubscribe("test");

await client.close();

const authCallback = async () => { /* auth logic */ };

client.publish("channel", "event", { data: "payload" });