Connect the Firebase authentication emulator from your Flutter app

Firebase relased the Authentication emulator recently.

Firebase project

You can use it in your existing Flutter app by adding, in firebase.json:

"auth": {
    "port": "9099",
    "host":" "0.0.0.0"
}

to the "emulators" object in your Firebase project. You can change port and host according to your needs.

Then you can run

firebase emulators:start --only functions,firestore,auth

replacing the list of emulators with your own list.

Flutter project

The FireFlutter plugin still does not allow to set the emulator for Firebase Authentication. You can set it up manually for iOS and Android.

For instance, for iOS, you can open ios/Tunner/AppDelegate.swift and add this line to the didFinishLaunchingWithOptions method:

Auth.auth().useEmulator(withHost: '0.0.0.0', post: 9099)

Also, remember to import Firebase in AppDelegate.swift:

import Firebase