Sorry for my explanation, but the "google translator" can no longer.
Basically, what I want is that it always asks for the password when starting the application.
If the user chooses "Exit" of the application and clicks the icon again to start it, it will ask for the password again. That's it.
Anyway, I thank you and the colleagues who have intervened, of course, for the time and effort dedicated.
Many thanks.
PS: I'm going to try "Foreground", to see if it works for me.