How to get player steam id?

Yeah thanks, but i don’t know where to start, i’m not a c++ developer.
However in the engine source i can find some calls to


ISteamUser* SteamUserPtr = SteamUser();
return SteamUserPtr && SteamUserPtr->GetSteamID();

or like in PlayerState


UniqueId.GetUniqueNetId();

But i can’t understand what i should do to go forward