Setting usernames per spawned actor

Hello AnswerHub, I have setup a login system in blueprints that lets user login to my server, after which it stores the username they typed in in the GameInstance blueprint.

When they spawn in my world I am trying to set their username which I get from the GameInstance, with repnotify on it, but this sets it for every single player logged in at that time, how do I make this variable different per spawned actor?

Thanks in advance.