Google Play Code Integration

Hi there. I was wondering if anyone knows how to integrate Google Play into a game that has been designed using the UE4 Engine? We are working on a game that requires it and wanted to know if we have to code anything special in the game to make it work. The game is similar to Clash of Clans style and need to have it spawn new people coming into and out of the game. Any suggestions would be greatly appreciated.

Ryan