Google Play Sign in Monogame

Hi, I’ve been using unity for some time and I’ve been trying Monogame recently because it’s C# which I like and also feel confortable with it, it’s open source and it’s a bit “lower level” than Unity, which I find that suits me better, as I have programming background.

I’m currently trying to add google play services to a Monogame Android Project but without success. I’m trying to see the Xamarin documentation, but it isn’t well explained, at least for me. Can someone help me in how to implement the sign in and get the access token? I just need that functionality, because I wan’t to use gamesparks as a backend, because it’s easier, but I would like to complement it with the google login, as it will be easier to users than create an account on the game.

Best Regards,