Can i use hotel wifi with a username and password on apple tv?
Basically the wifi network is called guest wifi. On your phone when you try to connect you are prompted to put in your room number and password. This doesn't happen on Apple TV box
If the wifi requires you to log in via a web page then you won't be able to use the Apple TV since it doesn't support login this way.
In any case, the hotel is likely to block protocols necessary for the Apple TV to work.