xxxxxxxxxx
Navigator.of(context).pushAndRemoveUntil(MaterialPageRoute(builder: (context) =>
LoginScreen()), (Route<dynamic> route) => false),
xxxxxxxxxx
Navigator.of(context)
.pushNamedAndRemoveUntil('/login', (Route<dynamic> route) => false);
// OR
Navigator.of(context).pushAndRemoveUntil(MaterialPageRoute(builder: (context) =>
LoginScreen()), (Route<dynamic> route) => false);