iOS AuthCode return void

[alexmaroldi]

Hi,
I have found this issue on iOS: after the first SignIn call, where I correctly retrieve the AuthCode after task completion, other calls to SignIn (or SignInSilently) always return empty string for task.Result.AuthCode

[mckoupel]

The same problem for me. Any ideas?
I'm trying to get access token using auth code but auth code is empty(

[alexmaroldi]

@mckoupel sadly it seems correct for Google policy on iOS.
I solved by getting AccessToken after the first AuthCode and use that for login with server. I don't know if this could help you.

[mckoupel]

Ok.
How you get access token using AuthCode? If I use something like this

 IEnumerator GetAccessToken(string authcode)
{
        WWWForm form = new WWWForm();
        form.AddField("client_id", webclientid);
        form.AddField("client_secret", "");
        form.AddField("grant_type", "authorization_code");
        form.AddField("code", authcode);

        UnityWebRequest www = UnityWebRequest.Post("https://www.googleapis.com/oauth2/v4/token", form);
        yield return www.SendWebRequest();

        if (www.isNetworkError || www.isHttpError)
        {
            Debug.Log(www.error);
        }
        else
        {
			
	 //Access token response
          Debug.Log(www.downloadHandler.text);

     }
 }

I always have 401 unauthorized...
Maybe something wrong with authcode lifetime?

[mckoupel]

And one more question. Is any way to reset authcode? After sign out I still have empty string in authcode. Sometimes authode not empty but I can't understand dependence. Maybe authcode lifecycle don't depend on sign out...Or something else wrong

[novavision]

Same here.. only 1st time I get AuthCode, and all other sign in attempts return empty field. Tried to remove app and reinstall - all the same.

[thsbrown]

Also having this issue. I thought ForceTokenRefresh = true could solve the issue as it looks like that would force consent, but it's not looking like it's working.

[thsbrown]

This stackoverflow post seems to be relevant here https://stackoverflow.com/questions/42434887/google-sign-in-server-auth-code-nil-ios