Google Play Games#

using GooglePlayGames;
using GooglePlayGames.BasicApi;
using UnityEngine;

public class GooglePlayGamesExampleScript : MonoBehaviour
{
    public string Token;
    public string Error;

    void Awake()
    {
        //Initialize PlayGamesPlatform
        PlayGamesPlatform.Activate();
        LoginGooglePlayGames();
    }

    public void LoginGooglePlayGames()
    {
        PlayGamesPlatform.Instance.Authenticate((success) =>
        {
            if (success == SignInStatus.Success)
            {
                Debug.Log("Login with Google Play games successful.");

                PlayGamesPlatform.Instance.RequestServerSideAccess(true, code =>
                {
                    Debug.Log("Authorization code: " + code);
                    Token = code;
// This token serves as an example to be used for SignInWithGooglePlayGames
                });
            }
            else
            {
                Error = "Failed to retrieve Google play games authorization code";
                Debug.Log("Login Unsuccessful");
            }
        });
    }
}

async Task SignInWithGooglePlayGamesAsync(string authCode)
{
    try
    {
        await AuthenticationService.Instance.SignInWithGooglePlayGamesAsync(authCode);
        Debug.Log("SignIn is successful.");
    }
    catch (AuthenticationException ex)
    {
        // Compare error code to AuthenticationErrorCodes
        // Notify the player with the proper error message
        Debug.LogException(ex);
    }
    catch (RequestFailedException ex)
    {
        // Compare error code to CommonErrorCodes
        // Notify the player with the proper error message
        Debug.LogException(ex);
    }
}

async Task LinkWithGooglePlayGamesAsync(string authCode)
{
    try
    {
        await AuthenticationService.Instance.LinkWithGooglePlayGamesAsync(authCode);
        Debug.Log("Link is successful.");
    }
    catch (AuthenticationException ex) when (ex.ErrorCode == AuthenticationErrorCodes.AccountAlreadyLinked)
    {
        // Prompt the player with an error message.
        Debug.LogError("This user is already linked with another account. Log in instead.");
    }

    catch (AuthenticationException ex)
    {
        // Compare error code to AuthenticationErrorCodes
        // Notify the player with the proper error message
        Debug.LogException(ex);
    }
    catch (RequestFailedException ex)
    {
        // Compare error code to CommonErrorCodes
        // Notify the player with the proper error message
        Debug.LogException(ex);
    }
}

async Task UnlinkGooglePlayGamesAsync(string idToken)
{
   try
   {
       await AuthenticationService.Instance.UnlinkGooglePlayGamesAsync(idToken);
       Debug.Log("Unlink is successful.");
   }
   catch (AuthenticationException ex)
   {
       // Compare error code to AuthenticationErrorCodes
       // Notify the player with the proper error message
       Debug.LogException(ex);
   }
   catch (RequestFailedException ex)
   {
       // Compare error code to CommonErrorCodes
       // Notify the player with the proper error message
       Debug.LogException(ex);
   }
}