users.Report: java.lang.UnsupportedOperationException: JsonNull

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java.lang.UnsupportedOperationException: JsonNull
users.Report: java.lang.UnsupportedOperationException: JsonNull
at com.impact.ribony.LoginActivity$1.onCompleted(
at com.impact.ribony.LoginActivity$1.onCompleted(
at com.koushikdutta.async.future.SimpleFuture.handleCallbackUnlocked(
at com.koushikdutta.async.future.SimpleFuture.setComplete(
at com.koushikdutta.ion.IonRequestBuilder$
at android.os.Handler.handleCallback(
at android.os.Handler.dispatchMessage(
at android.os.Looper.loop(
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(

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