question

Sure thing! That way I know I didn’t do anything odd when setting this up.

I’m using this sdk in Unity 2017.2. https://github.com/googlesamples/google-signin-unity

I then went to Firebase and created a new project. Under authentication -> sign in, you can add Google as an option. Where you enable it, there is a section for Web SDK configuration. This is where I got the web client ID and the Web client secret.

Also on this screen is a section that says Whitelist client IDs from external projects. There is a question mark next to it that includes a link to the Google API Console. Going there I get taken to the credentials.

Under there is a section for OAuth 2.0 client IDs. The web one should be listed there (and Android one if you set that up). There is a pencil to edit this.

This part I hope is correct. There is an Authorized redirect URIs in that section. I added https://oauth.playfab.com/oauth2/google to there.

Also need to get the sha1 key, which this explains how https://developers.google.com/android/guides/client-auth

This is used for the Android setup and will require your keystore from the Android build.

Once all that was setup, I was able to get the google-services.json file on Firebase. This included everything I needed and I added it to my Unity project.

The login code I used below.

private GoogleSignInConfiguration gConfig;

private void Awake()
{
//googleWebId is the web client ID from above
   gConfig = new GoogleSignInConfiguration
   {
      WebClientId = googleWebId,
      RequestIdToken = true
   };
}

public void LoginWithGoogle()
{
   GoogleSignIn.Configuration = gConfig;
   GoogleSignIn.Configuration.UseGameSignIn = false;
   GoogleSignIn.Configuration.RequestIdToken = true;
   GoogleSignIn.Configuration.RequestAuthCode = true;
        
   Debug.Log("Google Sign In");

   GoogleSignIn.DefaultInstance.SignIn().ContinueWith(GoogleSignInComplete);
}

internal void GoogleSignInComplete(Task<GoogleSignInUser> task)
{
   if (task.IsFaulted)
   {
      using (IEnumerator<System.Exception> enumerator =
                  task.Exception.InnerExceptions.GetEnumerator())
      {
         if (enumerator.MoveNext())
         {
            GoogleSignIn.SignInException error = (GoogleSignIn.SignInException)enumerator.Current;
            Debug.Log("Got Error: " + error.Status + " " + error.Message);
         }
         else
         {
            Debug.Log("Got Unexpected Exception?!?" + task.Exception);
         }
      }
   }
   else if (task.IsCanceled)
   {
      Debug.Log("Canceled");
   }
   else
   {
      Debug.Log("IDTOKEN " + task.Result.IdToken);
      Debug.Log("AUTHCODE " + task.Result.AuthCode);
      Debug.Log("Welcome: " + task.Result.DisplayName + "!");
      PlayFabClientAPI.LoginWithGoogleAccount(new LoginWithGoogleAccountRequest
      {
         ServerAuthCode = task.Result.AuthCode,
         CreateAccount = true,
         TitleId = playFabGameID

      }, (result) =>
      {
         print("PlayfabResults " + result.PlayFabId);
      }, (error) =>
      {
         print("ERROR " + error.ErrorMessage + " :::: " + error.ErrorDetails);
      });      
   }
}

Hello, I'm been trying for a week to do the same thing. Login via firebase and then when I extract AuthCode, I want to connect with google to the Playfab. Google side works, ask for email selection and retrieves server auth. However, when I try to login with playfab I get error: "unauthorized_client details".

Don't remember what I did, but everything is working.