How to let a client Join from Lobby while Match is ongoing

Hey ue4 community,
i have a quick question so i have been struggeling with something lately i want the client to be able to join the game and then travel after slotting in to a slot to the map. How would that be possible to do ? because my problem currently is that only connected players at that time are able to Travel but if somebody new joins i dont know how to make him travel without running the same command again and let everyone “retravel”.