Flutter:如何让它在应用程序中显示一个“请验证”页面，而不是在每个页面上都调用它？

import 'package:flutter/material.dart';

class VerificationPage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Verification Page'),
      ),
      body: Center(
        child: Text('Please verify your account.'),
      ),
    );
  }
}

class HomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Home Page'),
      ),
      body: Center(
        child: RaisedButton(
          child: Text('Verify'),
          onPressed: () {
            Navigator.push(
              context,
              MaterialPageRoute(builder: (context) => VerificationPage()),
            );
          },
        ),
      ),
    );
  }
}

void main() {
  runApp(MaterialApp(
    home: HomePage(),
  ));
}