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Install Bawanah Library

First, we have to install Bawabah Library from NPM (https://www.npmjs.com/package/bawabah) using the command: 
npm i bawabah
After installing the npm Package, we can start using it immediately: 
// Import Bawabah Library
import Bawabah from 'bawabah';

// Initialize Bawabah with your credentials
const bw = new Bawabah();
bw.init({
    appId: "your-app-id",
    appSecret: "your-app-secret"
});
Replace {your-app-id} with your appId and {your-app-secret}with your appSecret From Create Your First App Step.

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Create Callback Route

Now we will create the callback route to capture the user session. In this example, we will use Express.js to create the route, then capture the user session with the capture() function: But before that, we need to install Express.js using this command: 
npm i express

// Import Express and Bawabah Library
import express from 'express';
import Bawabah from 'bawabah';

// Initialize Bawabah with your credentials
const bw = new Bawabah();
bw.init({
    appId: "your-app-id",
    appSecret: "your-app-secret"
});

// Create Express app
const app = express();
const PORT = process.env.PORT || 3000;

// Callback route for Bawabah redirect
app.get('/login/callback', async (req, res) => {
    const sessionId = req.query.sessionId as string; // Get Session Id from Query /login/callback?sessionId=abc123

	// Capture user session from Bawabah
    const result = await bw.capture(sessionId);
    console.log(result); // Log User Data -- for Debugging --

    res.json({ loggedIn: true });
});

// Start the Express server
app.listen(PORT, () => {
    console.log(`Server running on http://localhost:${PORT}`);
});
Finally, after testing the implementation, we can add our Login/Signup logic and wrap the code in a try/catch block to catch any errors: 
// Import Express and Bawabah Library
import express from 'express';
import Bawabah from 'bawabah';

// Initialize Bawabah with your credentials
const bw = new Bawabah();
bw.init({
    appId: "your-app-id",
    appSecret: "your-app-secret"
});

// Create Express app
const app = express();
const PORT = process.env.PORT || 3000;

// Callback route for Bawabah redirect
app.get('/login/callback', async (req, res) => {
    const sessionId = req.query.sessionId as string; // Get Session Id from Query /login/callback?sessionId=abc123
    if (!sessionId) {
        // If sessionId is missing, return a 400 error
        return res.status(400).send('Missing sessionId in query');
    }

    try {
        // Capture user session from Bawabah
        const result = await bw.capture(sessionId);

        // --- Perform Your User Login/Signup Logic here ---

        res.status(200).json({ loggedIn: true });
    } catch (err) {
        // If Bawabah API Respond with an Error, return a 500 error to the user with details
        res.status(500).json({ error: 'Failed to capture session', details: err });
    }

});

// Start the Express server
app.listen(PORT, () => {
    console.log(`Server running on http://localhost:${PORT}`);
});
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Create Login Route

Create the /login route to serve the Login Page: 
// Import Express and Bawabah Library
import express from 'express';
import Bawabah from 'bawabah';

// Initialize Bawabah Library with your credentials
const bw = new Bawabah();
bw.init({
    appId: "your-app-id",
    appSecret: "your-app-secret"
});


// Create Express app
const app = express();
const PORT = process.env.PORT || 3000;

// Serve the login page at /login
app.get('/login', (req, res) => {
  res.sendFile(__dirname + '/public/login.html');
});

// Callback route for Bawabah redirect
app.get('/login/callback', async (req, res) => {
    const sessionId = req.query.sessionId as string; // Get Session Id from Query /login/callback?sessionId=abc123
    if (!sessionId) {
        // If sessionId is missing, return a 400 error
        return res.status(400).send('Missing sessionId in query');
    }

    try {
        // Capture user session from Bawabah
        const result = await bw.capture(sessionId);

        // --- Perform Your User Login/Signup Logic here ---

        res.status(200).json({ loggedIn: true });
    } catch (err) {
        // If Bawabah API Respond with an Error, return a 500 error to the user with details
        res.status(500).json({ error: 'Failed to capture session', details: err });
    }

});

// Start the Express server
app.listen(PORT, () => {
    console.log(`Server running on http://localhost:${PORT}`);
});

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Create Login Page

Create an HTML file with the name login.html to serve as the login page. 
<!DOCTYPE html>
<html lang="ar">
<head>
  <meta charset="UTF-8">
  <title>My Project</title>
  <style>
    body{
      display: flex;
      justify-content: center;
      align-items: center;
      min-height: 100svh;
    }

    h1{
      width: 100%;
      text-align: center;
    }
  </style>
</head>
<body>
  	<h1>Welcome to my Website</h1>
	<div id="login-form"></div>

  <script src="https://bawabah.app/app/login-form.js"></script>
  <script>
    startBawabah({
      element:"login-form",
      appId: "{your-app-id}", // 🔑 replace with real appId
      callbackUrl: "http://localhost:3000/login/callback"
    })
  </script>
</body>
</html>
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