Google Sign In Plugin for Unity

Overview

This plugin provides seamless Google authentication support for Unity applications targeting mobile platforms. It handles all native SDK setup and provides a simple C# API to sign in users, retrieve their profile info, and manage tokens.

Requirements

This plugin requires Google External Dependency Manager for Unity (EDM4U) to be present in the project to automatically resolve and manage native dependencies for Android and iOS.

Installation

By pckgs.io

Add the following scoped registry to your project's Packages/manifest.json file:

"scopedRegistries" : [
  {
    "name": "pckgs.io",
    "url": "https://upm.pckgs.io",
    "scopes": [
      "com.vuzmir"
    ]
  }
],

Then add the package dependency under the "dependencies" section:

"dependencies" : {
  "com.vuzmir.google-sign-in": "1.0.0"
}

By Git Url

You can install this plugin via Git URL using Unity Package Manager.

https://github.com/yvz-dmr/unity-google-sign-in.git

Configuration

1. In Unity, create a GoogleSignInOptions asset:

   • Right-click inside the Assets/Resources folder (create the folder if it doesn't exist)
   • Select Create → Vuzmir → Google Sign In Options

2. Select the newly created asset and fill in the required fields:

   • AndroidClientId or IOSClientId or both depending on your target platform

Make sure this asset is placed at the root of the Resources folder, so it can be loaded correctly.

Usage

Once you’ve completed the configuration steps, you can start using the plugin to authenticate users via GoogleSignInManager.

Here’s a basic example of how to use it in a MonoBehaviour:

using System.Threading.Tasks;
using UnityEngine;
using Vuzmir.UnityGoogleSignIn;

public class LoginManager : MonoBehaviour
{
    public async void SignInWithGoogle()
    {
        try
        {
            var result = await new GoogleSignInManager().SignIn();
            // Handle result
            Debug.Log(result.IdToken);
        }
        catch (GoogleSignInException ex)
        {
            // Handle error
            Debug.LogError($"Google Sign-In failed: {ex.Message}");
        }
    }
}