I'm using Unreal4 and already have my game working with its network system.

I want to use GameSparks for matchmaking, leaderboard and more. 

But still keeping the unreal network system for the game itself since it is already built well and I don't want to build a new one.

Is it something that going to be added in the future? Is there a way it can be implemented right now with javascript in the cloud code?