We are creating an original card game and since we are in an early stage of the design, we need to playtest a lot with friends and family.
I've searched for board/card game engine and found BGA and I like it, so I decided to begin the development of the current prototype of our game.
The version is almost ready and now I'm wondering how can I do the playtest phase. We've test with the game designer to play the game with account studios but we only managed to play it with him logging in with one of my test account and me on my primary test account (for example nickname0 and nickname1).
As we want to spread the playtest to more people how can we achieve that. I've seen that there is a preproduction servers but I can't find usefull information on how it works.