Steps to Reproduce
I followed the steps in the Firebase for Flutter codelab (steps 5 & 6), but it doesn't work.
Logs
flutter run with an android emulator yields this result:

flutter run with iOS simulator yields this result:


Flutter Doctor

Other
Downgrading the plugin to v0.0.2 OR changing to the master channel of flutter via flutter channel master allowed the android run to actually get on the device, but the app crashes and won't actually start (despite the console saying it's ready to go and press "r" to hot reload - aka no indication of a problem).