Auth0

// Initialize Auth0
const auth0 = new auth0.WebAuth({
  domain: 'your-auth0-domain.auth0.com',
  clientID: 'your-client-id',
});

// Trigger passwordless email login
auth0.passwordlessStart({
  email: 'user@example.com',
  send: 'code', // You can also use 'link' for a magic link
}, (err, res) => {
  if (!err) {
    // Passwordless email sent successfully
  }
});