Firebase authentication

Tonight you will complete the Google tutorial: "Add Firebase to Your Android Project" either by yourself or with a small group:

https://firebase.google.com/docs/android/setup

Your mission is to follow the tutorial and authenticate a user.  You pick which way you authenticate the user.  It can be through their Google account or Facebook account or...you decide.

https://firebase.google.com/docs/auth/ 

Once you have successfully authenticated the user, prove you have by getting their display name or email:

https://firebase.google.com/docs/auth/android/manage-users

Submit your code here.