If the Android app is crashing repeatedly when you try to open it, you need to clear the data for the app. To do this, follow the steps below (they may be slightly different depending on your phone and your version of Android).
Step 1: Head to the Android Settings menu. This can be done by tapping the gear icon in your notification shade.
Step 3: Tap on Storage and then tap on “Clear Data”.
Step 4: Relaunch the app and login.