content: import 'package:flutter/material.dart';
  
  class AuthPage extends StatefulWidget {
    @override
    _AuthPageState createState() => _AuthPageState();
  }
  
  class _AuthPageState extends State<AuthPage> {
    @override
    Widget build(BuildContext context) {
      return Scaffold(
        body: Container(
          child: SafeArea(
            child: Center(
              child: Column(
                children: <Widget>[
                  Row(
                    children: <Widget>[
                      ClipRRect(
                        borderRadius: BorderRadius.all(Radius.circular(32.0)),
                        child: Material(
                          shadowColor: Colors.transparent,
                          color: Colors.transparent,
                          child: IconButton(
                            icon: Icon(
                              Icons.menu,
                              color: Colors.black,
                            ),
                            onPressed: () {
                              Navigator.of(context).pop();
                            },
                          ),
                        ),
                      ),
                    ],
                  ),
                  Expanded(
                    child: Column(
                      mainAxisAlignment: MainAxisAlignment.center,
                      children: <Widget>[
                        Text('Sign in'),
                      ],
                    ),
                  ),
                ],
              ),
            ),
          ),
        ),
      );
    }
  }
  