Retention Event

Use RetentionData and AppEvent to send a retention event whenever the user opens the app.
Send this event:

After initial registration
On each subsequent app open

import { RetentionData, AppEvent } from "audiencelab_nodejs_sdk";

const retentionEventData = new RetentionData().setRetentionData(userData);
const retentionEvent = new AppEvent(client, retentionEventData, userData);

await retentionEvent.send().catch((error) => {
  console.error("Error sending retention event:", error);
});

Retention events help measure user engagement across sessions.