EVENT_FIRST_IMPRESSION
The user sees the Playtime content, for example the onResume method of the activity displaying the Playtime content is called. Trigger this event on the following user actions: 1) the user has opened your app and started a new Playtime-related session, 2) the user has brought your app from the background to the foreground to continue his Playtime-related session (exception: the user has left your app to allow usage tracking in his phone settings). The event should be triggered in both cases regardless of whether the user has already signed up or not. See io.adjoe.sdk.Playtime.sendUserEvent.