com.google.firebase.database.DatabaseException: Expected a Map while deserializing, but got a class java.lang.String at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.expectMap(CustomClassMapper.java:344) at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.deserializeToParameterizedType(CustomClassMapper.java:261) at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.deserializeToType(CustomClassMapper.java:176) at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.convertToCustomClass(CustomClassMapper.java:101) at com.google.firebase.database.DataSnapshot.getValue(DataSnapshot.java:229) at com.dts.yanzz.v20.LoginActivity$4.onChildAdded(LoginActivity.java:168) at com.google.firebase.database.core.ChildEventRegistration.fireEvent(ChildEventRegistration.java:79) at com.google.firebase.database.core.view.DataEvent.fire(DataEvent.java:63) at com.google.firebase.database.core.view.EventRaiser$1.run(EventRaiser.java:55) at android.os.Handler.handleCallback(Handler.java:883) at android.os.Handler.dispatchMessage(Handler.java:100) at android.os.Looper.loop(Looper.java:237) at android.app.ActivityThread.main(ActivityThread.java:7830) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1040)