​
Server-Side Implementation Example

Here’s an example of a Node.js Express endpoint that generates the required JWT: 
const express = require('express');
const jwt = require('jsonwebtoken');
const app = express();

// JWT secret key - get this from Reach
const REACH_SHARED_JWT_SECRET = process.env.REACH_SHARED_JWT_SECRET;

// Middleware to ensure user is authenticated
const authenticateUser = (req, res, next) => {
  // Implement your authentication logic here
  req.user = {
    email: 'user@example.com',
    name: 'Example User',
    id: 'biz_987654321',
  };
  next();
};

// Reach authentication endpoint
app.get('/reach-authtoken', authenticateUser, (req, res) => {
  try {
    const now = Math.floor(Date.now() / 1000);

    const payload = {
      email: req.user.email,
      name: req.user.name,
      tenantExternalId: req.user.id, // The user/business ID from your system
      partnerId:
        'Your unique vertical saas platform identifier provided by Reach',
      iat: now,
      exp: now + 3600, // 1 hour from now
    };

    const token = jwt.sign(payload, REACH_SHARED_JWT_SECRET);

    res.json({
      success: true,
      token: token,
    });
  } catch (error) {
    console.error('Error generating token:', error);
    res.status(500).json({
      success: false,
      error: 'Failed to generate token',
    });
  }
});