How To Add Firebase Authentication In Unity With Google – In today’s interconnected world of app development, ensuring secure and reliable user authentication is paramount. Firebase, Google’s comprehensive mobile and web application development platform, offers a robust solution through its authentication services. This guide aims to walk you through the process of integrating Firebase Authentication with Unity, specifically leveraging Google Sign-In, a popular method for seamless user authentication.
Understanding Unity Firebase Authentication With Google
Firebase Authentication provides backend services, easy-to-use SDKs, and ready-made UI libraries to authenticate users to your Unity applications. It supports various authentication methods including email/password, phone number, and third-party providers like Google, Facebook, and Twitter. Integrating Unity Firebase Google Sign In allows you to manage user sign-ins, safeguard user data, and personalize user experiences effortlessly.
Prerequisites
Before diving into the integration process, ensure you have the following prerequisites:
- Unity installed on your development machine (version 2017.4 or later recommended).
- Firebase account and project set up on the Firebase Console.
- Basic familiarity with Unity development and C# programming.
Step-by-Step Guide: Adding Firebase Authentication to Unity
Step 1: Setting Up Firebase Project
- Create a new Firebase project on the Firebase Console.
- Add your Unity application to the Firebase project.
Step 2: Installing Firebase SDK for Unity
- Download and import the Firebase SDK for Unity into your Unity project.
- Configure Firebase in your Unity project by adding the necessary configuration files.
Step 3: Configuring Google Sign-In
- Enable Google as an authentication provider in the Firebase Console.
- Obtain the Google Services JSON configuration file and add it to your Unity project.
Step 4: Implementing Authentication Logic
- Create a UI for Google Sign-In using Unity’s UI system (e.g., buttons and text fields).
- Write C# scripts to handle user authentication logic using Firebase SDK.
- Implement functions to handle sign-in, sign-out, and user profile management.
Step 5: Testing and Debugging
- Test the authentication flow in the Unity Editor and on actual devices (Android or iOS).
- Handle errors and edge cases gracefully (e.g., network errors, user cancellation).
Step 6: Enhancing User Experience
- Customize the authentication flow and UI elements to match your application’s design.
- Implement additional features like linking multiple authentication providers.
Unity Firebase Google Sign In Full Script
using System.Collections;
using System.Collections.Generic;
using System.Threading.Tasks;
using Firebase.Extensions;
using Google;
using UnityEngine;
using UnityEngine.UI;
public class FirebaseLogin : MonoBehaviour
{
public string GoogleAPI = "YOUR_API_KEY";
private GoogleSignInConfiguration configuration;
Firebase.DependencyStatus dependencyStatus = Firebase.DependencyStatus.UnavailableOther;
Firebase.Auth.FirebaseAuth auth;
Firebase.Auth.FirebaseUser user;
public Text Username, UserEmail;
public GameObject LoginScreen, ProfileScreen;
private void Awake() {
configuration = new GoogleSignInConfiguration{
WebClientId = GoogleAPI,
RequestIdToken = true,
};
}
private void Start() {
InitFirebase();
}
void InitFirebase() {
auth = Firebase.Auth.FirebaseAuth.DefaultInstance;
}
public void onClickGoogleSign() {
GoogleSignIn.Configuration = configuration;
GoogleSignIn.Configuration.UseGameSignIn = false;
GoogleSignIn.Configuration.RequestIdToken = true;
GoogleSignIn.Configuration.RequestEmail = true;
GoogleSignIn.DefaultInstance.SignIn().ContinueWith(OnGoogleAuthenticatedFinished);
}
void OnGoogleAuthenticatedFinished(Task<GoogleSignInUser> task) {
if (task.IsFaulted) {
Debug.LogError("Faulted");
} else if (task.IsCanceled) {
Debug.LogError("Cancelled");
} else {
Firebase.Auth.Credential credential = Firebase.Auth.GoogleAuthProvider.GetCredential(task.Result.IdToken, null);
auth.SignInWithCredentialAsync(credential).ContinueWithOnMainThread(task => {
if (task.IsCanceled) {
return;
}
if (task.IsFaulted) {
Debug.LogError("SignInWithCredentialAsync encountered an error: " + task.Exception);
return;
}
user = auth.CurrentUser;
Username.text = user.DisplayName;
UserEmail.text = user.Email;
LoginScreen.SetActive(false);
ProfileScreen.SetActive(true);
});
}
}
}