Navigator.of(context).pushAndRemoveUntil("/", (route) => false);
//named
Navigator.of(context)
.pushNamedAndRemoveUntil('/login', (Route<dynamic> route) => false);
//not named
Navigator.of(context).pushAndRemoveUntil(MaterialPageRoute(builder: (context) =>
LoginScreen()), (Route<dynamic> route) => false),