everyone can use the chat rooms without any authentication
Hello amir

I found a problem about video-call-app.
If I put it online, everyone can use the chat rooms.

For example, an anonym can make an url such as 'https://domain-name/video-call-app/comm.php?room=100' to enter a new chat room. Not only that, if he told above url to his friend, they can chat forever.

How to restrict the anonyms? or prevent them from using their selfmade urls to chat with others?
