How to disable Kubuntu login sound

I don't know about you, but in my case the login sound can be a problem at home while rebooting the system when my wife is sleeping, so I took a couple of minutes to find out how to disable it and here it is.
 

1. Go to "System Settings"
2. Click on "Notifications"
3. Select "KDE System Notifications" from the drop-down menu
4. Find the "Login" event
5. Untick the "Play a sound" option and that's it.

Here you can check the screenshot