I just bought the game to be able to play against friends. But I can't find any option for that in-game. Neither for the steam friends list nor facebook. Facebook is mentioned in one of the menu options, but there is not even an option to connect to FB????

Please Help !
Thanks !

I didn't find the right solution from the internet.

References:
-https://steamcommunity.com/app/368980/discussions/0/405692758722356567/
-whiteboard animation example