Firebase - Create user using FirebaseAdmin in ASP.NET CORE 3.1

In this article we will cover how to create firebase user using the Firebase Admin SDK in ASP.NET Core 3.1.

Prerequisites:

Understanding of ASP.NET Core 3.1 and Firebase

Let's Start:

The first step Let's create a fresh Asp.Net Core project and add below mentioned dll as reference from Nuget Package.

FirebaseAdmin

appsettings.json

Copy below mentioned code and replace it with existing code in appsettings.json.

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft": "Warning",
      "Microsoft.Hosting.Lifetime": "Information"
    }
  },
  "Firebase": {
    "type": "service_account",
    "project_id": "your_project_id",
    "client_email": "your_client_email",
    "client_id": "your_client_id",
    "private_key": "your_private_key"
  }
}

Refer Notes mentioned below to get all the keys mentioned inside appsettings.json related to firebase.

Model

Create Model named "Firebase.cs" and add below mentioned Properties.

namespace HpBlogs.Models
{
    public class Firebase
    {
        public string type { get; set; }
        public string project_id { get; set; }
        public string client_email { get; set; }
        public string client_id { get; set; }
        public string private_key { get; set; }
    }
}

FirebaseController.cs

Create Controller named "FirebaseController.cs" and replace it with below mentioned code.

using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Newtonsoft.Json;
using Microsoft.Extensions.Configuration;
using System;
using FirebaseAdmin;
using Google.Apis.Auth.OAuth2;
using FirebaseAdmin.Auth;

namespace HpBlogs.Controllers
{
    public class FireBaseController : Controller
    {
        IConfiguration _config { get; set; }
        public FireBaseController(IConfiguration configuration)
        {
            _config = configuration;
        }

        public async Task<IActionResult> Index()
        {
            try
            {
                // Get Firebase Configuration from appsettings.json and Bind to Firebase object
                Firebase fbconfig = new Firebase();
                _config.Bind("Firebase", fbconfig);

                var json = JsonConvert.SerializeObject(fbconfig);
                FirebaseApp.Create(new AppOptions()
                {
                    Credential = GoogleCredential.FromJson(json),
                });
            }
            catch { }

            // User Data with valid details
            UserRecordArgs args = new UserRecordArgs()
            {
                Email = "emailadddress@gmail.com",
                EmailVerified = false,
                PhoneNumber = $"+911234567890",
                Password = "password",
                DisplayName = "FullName",
                Disabled = false,
            };

            try
            {
                // Create User
                UserRecord createdUser = await FirebaseAuth.DefaultInstance.CreateUserAsync(args);
            }
            catch (Exception ex)
            {
                // check for any Exception like invalid email or mobile number
            }
            return View();
        }
    }
}