Access Leaderboards in Unreal Engine

Hello there!
So I'm reading documentation about Leaderboards at the moment, however I don't really know how to properly setup basic function for writing/reading them. C# code for me is not really helpfull :neutral:

Can someone provide for me any basic c++ code for it / any other guidelines than documentation?

What checks should i do before even trying to get them? Would appreciate you answers :smile: