Javax.Crypto.AEADBadTagException: Exception of type 'Javax.Crypto.AEADBadTagException' was thrown. ---> Java.Lang.Exception: Signature/MAC verification failed
   --- End of inner exception stack trace ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in <f32579baafc1404fa37ba3ec1abdc0bd>:0 
  at Java.Interop.JniEnvironment+InstanceMethods.CallNonvirtualObjectMethod (Java.Interop.JniObjectReference instance, Java.Interop.JniObjectReference type, Java.Interop.JniMethodInfo method, Java.Interop.JniArgumentValue* args) [0x00089] in <7802aa64ad574c33adca332a3fa9706a>:0 
  at Java.Interop.JniPeerMembers+JniInstanceMethods.InvokeNonvirtualObjectMethod (System.String encodedMember, Java.Interop.IJavaPeerable self, Java.Interop.JniArgumentValue* parameters) [0x0001f] in <7802aa64ad574c33adca332a3fa9706a>:0 
  at Javax.Crypto.Cipher.DoFinal (System.Byte[] input, System.Int32 inputOffset, System.Int32 inputLen) [0x00052] in <263adecfa58f4c449f1ff56156d886fd>:0 
  at Xamarin.Essentials.AndroidKeyStore.Decrypt (System.Byte[] data) [0x0005f] in <39c36f0831c64fc491c61f5f8d5bbdb5>:0 
  at Xamarin.Essentials.SecureStorage.PlatformGetAsync (System.String key) [0x0004f] in <39c36f0831c64fc491c61f5f8d5bbdb5>:0 
  at Xamarin.Essentials.SecureStorage.GetAsync (System.String key) [0x00013] in <39c36f0831c64fc491c61f5f8d5bbdb5>:0 
...
javax.crypto.AEADBadTagException
	at android.security.keystore.AndroidKeyStoreCipherSpiBase.engineDoFinal(AndroidKeyStoreCipherSpiBase.java:517)
	at javax.crypto.Cipher.doFinal(Cipher.java:2114)
	at md51558244f76c53b6aeda52c8a337f2c37.GenericMenuClickListener.n_onMenuItemClick(Native Method)
	at md51558244f76c53b6aeda52c8a337f2c37.GenericMenuClickListener.onMenuItemClick(GenericMenuClickListener.java:30)
	at android.support.v7.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:167)
	at android.support.v7.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:973)
	at android.support.v7.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:963)
	at android.support.v7.widget.ActionMenuView.invokeItem(ActionMenuView.java:624)
	at android.support.v7.view.menu.ActionMenuItemView.onClick(ActionMenuItemView.java:150)
	at android.view.View.performClick(View.java:5640)
	at android.view.View$PerformClick.run(View.java:22455)
	at android.os.Handler.handleCallback(Handler.java:751)
	at android.os.Handler.dispatchMessage(Handler.java:95)
	at android.os.Looper.loop(Looper.java:154)
	at android.app.ActivityThread.main(ActivityThread.java:6165)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:888)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:778)
Caused by: android.security.KeyStoreException: Signature/MAC verification failed
	at android.security.KeyStore.getKeyStoreException(KeyStore.java:666)
	at android.security.keystore.KeyStoreCryptoOperationChunkedStreamer.doFinal(KeyStoreCryptoOperationChunkedStreamer.java:224)
	at android.security.keystore.AndroidKeyStoreAuthenticatedAESCipherSpi$BufferAllOutputUntilDoFinalStreamer.doFinal(AndroidKeyStoreAuthenticatedAESCipherSpi.java:373)
	at android.security.keystore.AndroidKeyStoreCipherSpiBase.engineDoFinal(AndroidKeyStoreCipherSpiBase.java:506)
	... 17 more

...
 at OnAppearing in MainPage