🚀 ASP.NET Core 9 Identity + Google OAuth2 Starter

✅ OAuth2App — Secure Login (Identity + Google Login) | SQL Server | .NET 9 MVC

A production-ready starter template that integrates:

• 🔐 ASP.NET Core Identity (Individual Accounts)
• 🌐 Google OAuth 2.0 Authentication
• 🧠 ASP.NET Core MVC (.NET 9)
• 🗄️ Microsoft SQL Server
• 🎯 Fully Ready Authentication system with Login/Register UI
• 🏗️ Identity scaffolding option to customize UI

Perfect for developers looking to build secure enterprise-ready authentication systems fast.

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✨ Features

Feature	Description
🔑 Authentication	ASP.NET Identity + Google OAuth2
💾 Database	SQL Server (Local/Cloud)
🌍 Framework	.NET 9 MVC
📁 Identity UI	Built-in + scaffolding support
⚙️ Configurable	appsettings.json based setup
🏁 Ready to Run	Just migrate DB + run project

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📁 Project Structure

OAuth2App/
├── Controllers/
├── Data/
├── Views/
├── appsettings.json
└── Program.cs

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🧰 Prerequisites

Tool	Version
✅ .NET SDK	9.x
✅ SQL Server	LocalDB / Express / Remote
✅ EF Core Tools	dotnet tool install

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⚙️ Setup Guide

1️⃣ Clone the Repository

git clone https://github.com/msaifulcsse/AspNetCore-Identity-GoogleAuth-Starter.git
cd AspNetCore-Identity-GoogleAuth-Starter/OAuth2App

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2️⃣ Update Database Connection

Edit appsettings.json 👇

"ConnectionStrings": {
  "DefaultConnection": "Server=localhost;Database=oauth2_db_dev;User Id=YOUR_DB_USER;Password=YOUR_DB_PASSWORD;MultipleActiveResultSets=true;TrustServerCertificate=True"
}

⚠ Replace with your SQL credentials

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3️⃣ Configure Google OAuth Credentials

➤ Go to Google Cloud Console

https://console.cloud.google.com/

Path: APIs & Services > Credentials > Create Credentials > OAuth client ID

Set:

Key	Value
Application type	Web application
Authorized redirect URI	https://localhost:5001/signin-google

✅ Copy Client ID & Client Secret → put in appsettings.json

"Authentication": {
  "Google": {
    "ClientId": "YOUR_CLIENT_ID",
    "ClientSecret": "YOUR_CLIENT_SECRET"
  }
}

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4️⃣ Run EF Core Migration

dotnet tool install --global dotnet-ef
dotnet ef database update

Creates Identity tables + DB

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5️⃣ Run the App 🚀

dotnet run

Open Browser:

https://localhost:5001

Login → you'll see Google Sign-In button ✅

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🛠 Optional: Scaffold Identity Pages (for customization)

dotnet aspnet-codegenerator identity -dc OAuth2App.Data.ApplicationDbContext

This generates:

• Login.cshtml
• Register.cshtml
• Manage pages
• Account controllers

Edit UI / policies / password rules as needed 🎨

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📸 Preview (Auth Flow)

Screen	Description
🔐 Login	Username/Password + Google Login
📝 Register	Individual account creation
🎫 Identity DB	MSSQL tables created by EF

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🧪 Test Credentials

✅ Local account signup ✅ Google login ✅ Email verified usage supported

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🧠 Pro Tip

Add role support after setup:

services.AddDefaultIdentity<IdentityUser>()
    .AddRoles<IdentityRole>()
    .AddEntityFrameworkStores<ApplicationDbContext>();

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📞 Contact / Community

Contact	Link
👤 Name	M SAIFUL ISLAM
📧 Email	saifulbdjoy@gmail.com
🌐 GitHub	https://github.com/msaifulcsse
🔗 LinkedIn	https://linkedin.com/in/msaifulcsse
📱 Phone	+8801750-533313

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🧾 License

MIT License — Use freely. Credit appreciated ❤️

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