java.lang.NullPointerException

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    • java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.lang.Object.toString()' on a null object reference at earth.planet.passwordguard.Fragment1$1.onDataChange(Fragment1.java:74) at com.google.firebase.database.Query$1.onDataChange(Unknown Source) at com.google.android.gms.internal.zzajp.zza(Unknown Source) at com.google.android.gms.internal.zzakp.zzcxi(Unknown Source) at com.google.android.gms.internal.zzaks$1.run(Unknown Source) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:135) at android.app.ActivityThread.main(ActivityThread.java:5290) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:911) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:706)
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