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Attempt to invoke virtual method 'void android.app.Activity.setResult(int, android.content.Intent)' on a null object reference
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.app.Activity.setResult(int, android.content.Intent)' on a null object reference	at com.firebase.ui.auth.ui.BaseHelper.finishActivity(BaseHelper.java:51)	at com.firebase.ui.auth.ui.FragmentHelper.finish(FragmentHelper.java:27)	at com.firebase.ui.auth.ui.FragmentBase.finish(FragmentBase.java:26)	at com.firebase.ui.auth.util.signincontainer.SaveSmartLock.finish(SaveSmartLock.java:178)	at com.firebase.ui.auth.util.signincontainer.SaveSmartLock.saveCredentialsOrFinish(SaveSmartLock.java:198)	at com.firebase.ui.auth.ui.BaseHelper.saveCredentialsOrFinish(BaseHelper.java:124)	at com.firebase.ui.auth.ui.BaseHelper.saveCredentialsOrFinish(BaseHelper.java:112)	at com.firebase.ui.auth.ui.idp.CredentialSignInHandler.onComplete(CredentialSignInHandler.java:68)	at com.google.android.gms.tasks.zzc$1.run(Unknown Source)	at android.os.Handler.handleCallback(Handler.java:751)	at android.os.Handler.dispatchMessage(Handler.java:95)	at android.os.Looper.loop(Looper.java:154)	at android.app.ActivityThread.main(ActivityThread.java:6119)	at java.lang.reflect.Method.invoke(Native Method)	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)