feat: update authentication to latest versions

Author: exaby73

.gitignore

@@ -51,3 +51,9 @@ analytics/macos/firebase_app_id_file.json
 analytics/macos/Runner/GoogleService-Info.plist
 analytics/lib/firebase_options.dart
 dynamic_links/lib/firebase_options.dart
+
+# ignore firebase_options.dart for all examples
+**/firebase_options.dart
+
+# ignore .firebaserc for all examples
+**/.firebaserc

authentication/.firebaserc

@@ -44,3 +44,6 @@ app.*.map.json
 /android/app/debug
 /android/app/profile
 /android/app/release
+/ios/firebase_app_id_file.json
+/ios/Runner/GoogleService-Info.plist
+/android/app/google-services.json

authentication/.gitignore

@@ -1,52 +1,50 @@
-Firebase Auth Quickstart
-==============================
+# Firebase Auth Quickstart
 
-Introduction
-------------
+## Introduction
 
 - [Read more about Firebase Auth](https://firebase.google.com)
 
-Getting Started
----------------
+## Getting Started
 
 - [Add Firebase to your Flutter Project](https://firebase.google.com/docs/flutter/setup).
 
-This example contains Email / Password login and signup using Firebase in a 
-Flutter app. In order to run the example, you'll need to set up your app in 
+This example contains Email / Password login and signup using Firebase in a
+Flutter app. In order to run the example, you'll need to set up your app in
 the Firebase console. You will then want to run the flutterfire_cli to
 sync all API keys locally to this application.
 
+- Run `firebase emulators:start` to start the local Firebase emulator suite.
+
+- Run `flutter run` to start the app.
+
 ### Email/Password Setup
 
 - Go to the [Firebase Console][fir-console] and navigate to your project:
-    - Select the **Auth** panel and then click the **Sign In Method** tab.
-    - Click **Email/Password** and turn on the **Enable** switch, then click **Save**.
-    - Under **Authorized Domains** click **Add Domain** and add `auth.example.com`.
+  - Select the **Auth** panel and then click the **Sign In Method** tab.
+  - Click **Email/Password** and turn on the **Enable** switch, then click **Save**.
 
-Support
--------
+## Support
 
 - [Stack Overflow](https://stackoverflow.com/questions/tagged/firebase-authentication)
 - [Firebase Support](https://firebase.google.com/support/)
 
-License
--------
+## License
 
 Copyright 2022 Google, Inc.
 
 Licensed to the Apache Software Foundation (ASF) under one or more contributor
-license agreements.  See the NOTICE file distributed with this work for
-additional information regarding copyright ownership.  The ASF licenses this
+license agreements. See the NOTICE file distributed with this work for
+additional information regarding copyright ownership. The ASF licenses this
 file to you under the Apache License, Version 2.0 (the "License"); you may not
-use this file except in compliance with the License.  You may obtain a copy of
+use this file except in compliance with the License. You may obtain a copy of
 the License at
 
 http://www.apache.org/licenses/LICENSE-2.0
 
 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 License for the specific language governing permissions and limitations under
 the License.
 
-[fir-console]: https://console.firebase.google.com
+[fir-console]: https://console.firebase.google.com