How to remove Lobby Feature for RTS?

Sorry if i post this in the wrong place. if so , please tell me where to do so.

Hi everyone, im new to this engine.

I have only gone through the "3D programming all in one" book and done a few tutorials.

I would like to develop a RPG/RTS game where players have multiple characters which can fight.

I thought of using the RTS starter kit as a base.
I know how to fix the Selection, Units etc to fit my game.

However, i have no idea on how to remove the lobby feature (implemented in the RTS starter kit) for my RPG-like game.
I want players to be able to leave and join the game as and when they like.

Thanks.