Firebase authentication delegate/support for dart-board.
Make sure to include Firebase in your app. This does not perform any config.
Follow googles instructions. It varies depending on platform. You will need to edit HTML/Android/iOS files and set things up in the console. This tutorial doesn't really cover that.
dart_board_firebase_core dependency will handle the firebase init for you.
Just include it, and place a LoginButton();
Otherwise, standard dart_board_authentication usage for auth updates and user info.