import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Demo',
      home: Scaffold(
        appBar: AppBar(title: Text("Demo")),
        body: _Login(),
      ),
    );
  }
}

class _Login extends StatefulWidget {
  @override
  __LoginState createState() => __LoginState();
}

class __LoginState extends State<_Login> {
  String email;
  String password;

  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.all(12),
      child: AutofillGroup(
        child: Column(
          children: [
            TextField(
              onChanged: (e) => email = e,
              decoration: InputDecoration(labelText: 'Email'),
              autofillHints: [AutofillHints.email],
            ),
            TextField(
              onChanged: (p) => password = p,
              decoration: InputDecoration(labelText: 'Password'),
              autofillHints: [AutofillHints.password],
            ),
          ],
        ),
      ),
    );
  }
}

[✓] Flutter (Channel master, 1.20.0-8.0.pre.56, on Mac OS X 10.15.5 19F96, locale en-DE)
[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.3)
[✓] Xcode - develop for iOS and macOS (Xcode 11.5)
[✓] Chrome - develop for the web
[✓] Android Studio (version 3.6)
[✓] VS Code (version 1.47.0)
[✓] Connected device (3 available)

• No issues found!