Hello, itry and modify the samples of b4a firebase push notification with b4jsending tool. It work fine.
Now i ask for this question:
if i logging into app with google credentials and read the username of the mail and set this as topic of push notification subscription and sending messages the notification is send to only this specified users ? i try modify manually the code and work fine. But i want to know if this method is correct or maybe create complicance in the application. Thanks in advanced