Add Authentication to Next.js With One Line of Code

export default authMiddleware() That’s it. One line in your middleware file and your Next.js app has authentication — sign-up, sign-in, sign-out, session management, and protected routes. No wrestling with JWTs, no hand-rolling session logic, no third-party cookie headaches. Just drop it in and move on. We built MonoGrub, a sample food ordering app, to show what this looks like in a real project. It’s open source, runs locally in five minutes, and covers the auth patterns you’ll actually need in production. Let’s walk through what it does. One Line, Full Auth When you call authMiddleware(), MonoCloud handles the entire OpenID Connect flow behind the scenes — redirects, token exchange, cookie-based sessions, silent refresh. Your users get a polished sign-up and sign-in experience, and you don't write a single line of auth plumbing. But the real power shows up when you need more control. Want to lock down your admin section to a specific group of users? Pass a config: export default auth