How do I get a master server working?

Everything I search I only find people asking how to get a master server working without steam.

I am using steam though and so there are no tutorials to make a master server.

I just want my game to search for games online for people to join, please can someone tell me how in blueprints ?

Steamworks is already setup and the steam overlay pops up which proves it is working, I can not find the next steps anywhere.

Maybe without steam then ? Or even using C++ ??

Please somebody, there is no information anywhere, how is this done ?