1- Created Firebase Authetication application with Activities.
2- Used MVVM architecture.
3- Used some animations while moving one activity to another activity.
4- After the signin activity, user can move towards the DrawerLayout actitvity.
5- As you can see, also used crashlytics which is also a feature of firebase, in which firebase can detect if activity crashes anywhere.
6- Used PushNotification from the firebase console and it has reflecteed after clicking.