Authentication Patterns for Modern Web Apps

Beyond Username and Password

Authentication has evolved far beyond simple login forms. Modern apps need to handle OAuth, magic links, passkeys, and multi-factor authentication — all while keeping the user experience smooth.

JWT vs Sessions

The JWT vs session debate is nuanced. JWTs work well for stateless APIs and microservices, but sessions offer better revocation and smaller payloads. We often use a hybrid approach.

  () {
    (: , : ) => {
     token = req..?.(, )
     (!token)  res.().({ :  })
    
     payload =  (token)
     (!payload)  res.().({ :  })
    
     (req, res)
  }
}