🔐 Szabi Auth with 2FA

A simple Node.js + Express backend with JSON user storage and TOTP 2FA, paired with a React + TailwindCSS frontend.
Perfect for learning token-based auth with a dash of security sauce.

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🚀 Features

• User registration with optional 2FA (Google Authenticator, Authy, etc.)
• Login with username, password, and 2FA token
• JWT token issuance after successful login
• Users stored in a local JSON file (easy peasy storage)
• Frontend in React + TailwindCSS for a clean UI

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🛠️ Tech Stack

• Backend: Node.js, Express, speakeasy (for 2FA), jsonwebtoken
• Frontend: React, TailwindCSS, Axios
• Storage: JSON file for users

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📦 Installation

1. Clone the repo

   git clone https://your-repo-url.git
   cd your-repo-folder

2. Install backend deps

   cd backend
   npm install

3. Start backend

   node index.js

4. Install frontend deps

   cd ../frontend
   npm install

5. Start frontend

   npm run dev

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⚙️ Usage

• Register a user, toggle 2FA if you want
• If 2FA enabled, scan the QR with your Authenticator app
• Login with your creds + 2FA code (if enabled)
• Receive JWT token on success
• Use token to access protected routes (not included, but easy to add)

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🔧 CORS Fix

Make sure your backend allows requests from your frontend origin by adding this to your backend code:

const cors = require('cors')
app.use(cors({ origin: 'http://localhost:5173', credentials: true }))

Replace http://localhost:5173 with your frontend URL.

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🤔 Why?

Just a fun project to learn real-world authentication flows with 2FA and tokens. You can extend it to use databases, refresh tokens, or anything you want!

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🙌 Contributions

PRs welcome! Hit me up if you wanna collab or have ideas.

Copy-paste and customize! Need it tweaked? Just say the word.