Clean transactional email and webhooks for Express.js applications

import express from 'express';
import { SadaSend } from 'sadasend';

const app = express();
app.use(express.json());

const sadasend = new SadaSend({ apiKey: process.env.SADASEND_API_KEY });

app.post('/api/auth/register', async (req, res) => {
  const { email, username } = req.body;

  const { data, error } = await sadasend.emails.send({
    from: 'Welcome <onboarding@yourdomain.com>',
    to: email,
    subject: `Welcome to the team, ${username}!`,
    html: `<p>Hi ${username}, your account has been verified.</p>`,
    tags: ['onboarding', 'auth'],
  });

  if (error) {
    return res.status(500).json({ error: error.message });
  }

  res.json({ message: 'User registered and confirmation email sent', id: data.id });
});

app.listen(6000, () => console.log('Server running on port 6000'));