After long struggles i finally managed to make "google sign in" work with playfab. The only issue is accounts created with "google sign in" don't have usernames. In my game the username is the way people find each other to add each other as friends.
I saw that playfab seemed to have this function: "AddUsernamePassword" that was supposetivly exactlly for the purpose I needed it for but it doesn't seem to work. I have to put an e-mail and a password asides from the username.
-For the password I just put something random since the accounts don't need a password people log in via google sign in.
-For the e-mail I put the g-mail of the user. But it doesn't work it tells me that the e-mail already exists and if I remove the e-mail it tells me it needs an e-mail.
I'm not sure how i'm going to go about giving my users that made their accounts via google sign in usernames or anything so they are identifiable in a human friendly way?