MyFirebaseMessagingService.kt

class MyFirebaseMessagingService : FirebaseMessagingService() {

    private val userPreferences: UserPreferences by inject()

    override fun onMessageReceived(remoteMessage: RemoteMessage) {
        // ...

        // TODO(developer): Handle FCM messages here.
        // Not getting messages here? See why this may be: https://goo.gl/39bRNJ
        Timber.e("From: %s", remoteMessage.from)

        // Check if message contains a data payload.
        if (remoteMessage.data.isNotEmpty()) {
            Timber.e("Message data payload: %s", remoteMessage.data)
            Timber.e("Message body: %s", remoteMessage.notification!!.body)
        }

        // Check if message contains a notification payload.
        if (remoteMessage.notification != null) {
            Timber.e("Message Notification Body: %s", remoteMessage.notification!!.body)
        }

        // Also if you intend on generating your own notifications as a result of a received FCM
        // message, here is where that should be initiated. See sendNotification method below.
    }

    /**
     * Called if InstanceID token is updated. This may occur if the security of
     * the previous token had been compromised. Note that this is called when the InstanceID token
     * is initially generated so this is where you would retrieve the token.
     */
    override fun onNewToken(token: String) {
        Log.e("TAGGGGG","Refreshed token: $token")
        userPreferences.save(UserPreferences.USER_TOKEN, token)
    }
}