I forgot my Apple TV logon password

What password exactly? Apple TV's don't really have logion passwords. They have Airplay passcodes, and they use your Apple IDs password to log on to the iTunes Store.

If you forgot your Apple ID password, see here: link-> If you forgot your Apple ID password - Apple Support

If you forgot your Airplay passcode, see here: link-> If you're asked to enter an AirPlay password on Apple TV - Apple Support