AuthPage.dart

import 'package:flutter/material.dart';

class AuthPage extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return _AuthPageState();
  }
}

class _AuthPageState extends State<AuthPage> {
  String _emailValue, _passwordValue;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Login'),
      ),
      body: Container(
        margin: EdgeInsets.all(10.0),
        child: ListView(
          children: <Widget>[
            TextField(
              keyboardType: TextInputType.emailAddress,
              autocorrect: false,
              autofocus: true,
              decoration: InputDecoration(labelText: 'Email'),
              onChanged: (String value) {
                setState(() {
                  _emailValue = value;
                });
              },
            ),
            TextField(
              obscureText: true,
              autocorrect: false,
              autofocus: true,
              decoration: InputDecoration(labelText: 'Password'),
              onChanged: (String value) {
                setState(() {
                  _passwordValue = value;
                });
              },
            ),
            SizedBox(
              height: 10.0,
            ),
            RaisedButton(
              color: Theme.of(context).accentColor,
              textColor: Colors.white,
              child: Text('Login'),
              onPressed: () {
                print(_emailValue);
                print(_passwordValue);

                Navigator.pushReplacementNamed(context, '/products');
              },
            ),
          ],
        ),
      ),
      // body: Center(
      //   child: RaisedButton(
      //     child: Text('LOGIN'),
      //     onPressed: () {
      //       Navigator.pushReplacementNamed(context, '/products');
      //     },
      //   ),
      // ),
    );
  }
}