question

OK, so.. I have this working... but it still doesn't work!

Allow me to elaborate (so that future developers can avoid my mistakes, and maybe someone can help me out!)

Firstly I was getting this error:

Google API error code: invalid client details: unauthorized

This was caused by incorrect set up on the Google Dev Console and Playfab.

To fix this I did the following:

1. Made sure my oAuth token had the right scopes:
   - https://www.googleapis.com/auth/games
   - profile
2. Used the correct oAuth secret key - the 24(ish) character string, not the JSON
3. Added authorised JavaScript Origins and Redirect URIs in my Google API settings
   https://blog.playfab.com//blog/setting-up-google-sign-in
4. Made sure the PlayFab Google add-on was configured to use the Client ID and Client Secret for a Web App - not an Android app!

This worked a little better, and gave me this error:

Google API error code: invalid grant details: already redeemed.

This is caused by a sending a token or code that has been used up. So I waited a bit and tried again. Different error:

Google API error code: invalid grant details: Incorrect token type.

This error is caused by sending an Access Token instead of an Authorization Code. Or vice versa.

Now, according to this documentation LinkGoogeAccount can take either... but for some reason the PlayFab Unity SDK implementation of LinkGoogleAccount doesn't support Access Tokens... so I added it manually...

    public class LinkGoogleAccountRequest : PlayFabRequestCommon
    {
        /// <summary>
        /// Server authentication code obtained on the client by calling getServerAuthCode() (https://developers.google.com/identity/sign-in/android/offline-access) from Google Play for the user.
        /// </summary>
        public string ServerAuthCode;
        /// <summary>
        /// Added by Dan.
        /// </summary>
        public string AccessToken;
        /// <summary>
        /// If another user is already linked to the account, unlink the other user and re-link.
        /// </summary>
        public bool? ForceLink;
    }

...which let me use my Access Token to link the accounts.

Finally it worked - I am getting a successful result when I call LinkGoogleAccount.

However, when I check the Player Data on PlayFab, no Google account has been linked - I can only see the Android device and linked Facebook account (which I successfully linked earlier):

So does anyone know why I am getting a successful response without any account linking actually having happened?

Thanks,

Dan

string authCode;
string webClientAppID = "long code copied from your Google Dev Console";

GooglePlayManager.ActionServerAuthCodeLoaded += ActionCodeLoaded;
GooglePlayManager.Instance.GetGamesServerAuthCode(webClientAppID);

private void ActionCodeLoaded(GooglePlayResult result, string code)
{
Debug.Log("Got Code: " + code);
Debug.Log("Got Result Message: " + result.Message);
Debug.Log("Got Result Response: " + result.Response);
authCode = code;
}