Hello, in the past I've used Game Center for online leaderboards, and I wanted to use it for online multiplayer support. But I've read recently that Apple is getting rid of the Game Center app. I'm not sure if I can still use it for online multiplayer support. But perhaps there's better choices out there. Could anyone recommend some good choices for iOS online multiplayer service providers? I'd prefer if it was free, and extra bonus points if I can use the Swift language to use it.