void CreateOrJoinChatRoom ( [FUniqueNetIdRepl](API\Runtime\Engine\GameFramework\FUniqueNetIdRepl) LocalUserId, [FChatRoomId](API\Plugins\OnlineSubsystem\Interfaces\FChatRoomId) ChatRoomId, [FOnChatRoomCreatedOrJoined](API\Plugins\Party\FOnChatRoomCreatedOrJoined) CompletionDelegate, [FChatRoomConfig](API\Plugins\OnlineSubsystem\Interfaces\FChatRoomConfig) RoomConfig )