How can you reset your Apple TV password when you've forgotten what your current password is?

I have not done anything with apple TV, however I found these.
https://discussions.apple.com/thread/3892000?start=0&tstart=0
How do I change my Apple TV password? - Plex Forums (http://forums.plexapp.com/index.php/topic/30140-how-do-i-change-my-apple-tv-password/)