Error while assigning roles

There seem to be an error happening in <a href="https://github.com/ZirixCZ/Spellcaster/blob/master/backend/utils/manageRoles.go">manageRoles.go</a> while assigning roles for more than 2 people. It can be replicated when one account connects twice. Tested with two accounts where one of them connected twice and one connected once.