Add Firebase auth

In this section, we will...

  • Install firebase_auth package for flutter
  • Add code to register user with firebase auth
  • Register user and check firebase auth console

Install firebase_auth package

https://pub.dev/packages/firebase_auth

pubspec.yaml
...
dependencies:
flutter:
sdk: flutter
# The following adds the Cupertino Icons font to your application.
# Use with the CupertinoIcons class for iOS style icons.
cupertino_icons: ^0.1.2
email_validator: '^1.0.0'
firebase_auth: ^0.15.3+1
...

Add firebase auth code for register user

onPressed: () async {
if (_registerFormKey.currentState.validate()) {
try {
// Register user by firebase auth
final FirebaseUser user = (await FirebaseAuth.instance
.createUserWithEmailAndPassword(
email: _emailController.text,
password: _passwordController.text
)).user;
Navigator.pushNamed(context, '/');
} catch (e) {
print('Error Happened!!!: $e');
}
}
},

This code is based on official Flutter firebase auth example:

And this is the link about Handling errors (async await, try catch)

https://dart.dev/codelabs/async-await#handling-errors

Test register and Check Firebase Auth Console

So, let's fill in a register form.

Then, visit https://console.firebase.google.com/

And check firebase console authentication tab.

You see email are registered.

Error memo

Error when debugging mode:

(MissingPluginException(No implementation found for method createUserWithEmailAndPassword on channel plugins.flutter.io/firebase_auth))

https://github.com/flutter/flutter/issues/14137#issuecomment-429150844

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