Yes. The games use a Facebook API to access the user’s profile and collect their info. When a user interacts with a game for the very first time, Facebook will seek their permission to access their name, email and location. If the consent is given, then Klujo will capture and store this info, and the game will load. However, if the user declines this authorization, the game will not load.
If an already authenticated user comes back to your site, the games will load without any additional authorization. The system will remember who they are.