In flutter, when the user uses the back button, I want it to show a dialog to confirm they want to leave the page

I did this before using the following code:

AppScaffold(
      body: WillPopScope(
        onWillPop: () {
            showLogoutDialog(context);
            return false;
        },
        child: Contents(),
      ),
);

As WillPopScope is now deprecated, how would I do this using the new PopScope, or any other method?

PopScope has a canPop property, and onPopInvoked which the documentation metions:

method is called; the pop has already happened. Use [canPop] to
disable pops in advance.