E/AndroidRuntime: FATAL EXCEPTION: main Process: com.infinite.fastfood, PID: 8623 com.google.firebase.database.DatabaseException: Class com.infinite.fastfood.Model.Users does not define a no-argument constructor. If you are using ProGuard, make sure these constructors are not stripped. at com.google.firebase.database.core.utilities.encoding.CustomClassMapper$BeanMapper.deserialize(com.google.firebase:firebase-database@@18.0.1:552) at com.google.firebase.database.core.utilities.encoding.CustomClassMapper$BeanMapper.deserialize(com.google.firebase:firebase-database@@18.0.1:545) at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.convertBean(com.google.firebase:firebase-database@@18.0.1:415) at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.deserializeToClass(com.google.firebase:firebase-database@@18.0.1:214) at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.convertToCustomClass(com.google.firebase:firebase-database@@18.0.1:79) at com.google.firebase.database.DataSnapshot.getValue(com.google.firebase:firebase-database@@18.0.1:212) at com.infinite.fastfood.MainActivity$3.onDataChange(MainActivity.java:93) at com.google.firebase.database.Query$1.onDataChange(com.google.firebase:firebase-database@@18.0.1:184) at com.google.firebase.database.core.ValueEventRegistration.fireEvent(com.google.firebase:firebase-database@@18.0.1:75) at com.google.firebase.database.core.view.DataEvent.fire(com.google.firebase:firebase-database@@18.0.1:63) at com.google.firebase.database.core.view.EventRaiser$1.run(com.google.firebase:firebase-database@@18.0.1:55) at android.os.Handler.handleCallback(Handler.java:751) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:154) at android.app.ActivityThread.main(ActivityThread.java:6077) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756)
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