This Unreal Community Led Training video indroduces new features, and demonstrates implementation: “Getting your game working with Steam is frequently an important part of one’s development cycle. Cedric will begin with a walkthrough on how to integrate the Steam SDK, and once that’s ready to go, he’ll dive into exposing your friends list to UMG.”
Using the Steam Online Subsystem Plugin for Unreal Editor 4.17.1, you can add Steam integration to your game.
You’ll need to install the the ‘Online Subsystem Steam’ plugin
Blueprint node to access friends list, avatars, online status
-Scott Beam (fry)