supabase/examples/auth/nextjs/app/protected/page.tsx

import DeployButton from '@/components/DeployButton'
import AuthButton from '@/components/AuthButton'
import { createClient } from '@/utils/supabase/server'
import FetchDataSteps from '@/components/tutorial/FetchDataSteps'
import Header from '@/components/Header'
import { redirect } from 'next/navigation'

export default async function ProtectedPage() {
  const supabase = await createClient()

  const {
    data: { user },
  } = await supabase.auth.getUser()

  if (!user) {
    return redirect('/login')
  }

  return (
    <div className="flex-1 w-full flex flex-col gap-20 items-center">
      <div className="w-full">
        <div className="py-6 font-bold bg-purple-950 text-center">
          This is a protected page that you can only see as an authenticated user
        </div>
        <nav className="w-full flex justify-center border-b border-b-foreground/10 h-16">
          <div className="w-full max-w-4xl flex justify-between items-center p-3 text-sm">
            <DeployButton />
            <AuthButton />
          </div>
        </nav>
      </div>

      <div className="animate-in flex-1 flex flex-col gap-20 opacity-0 max-w-4xl px-3">
        <Header />
        <main className="flex-1 flex flex-col gap-6">
          <h2 className="font-bold text-4xl mb-4">Next steps</h2>
          <FetchDataSteps />
        </main>
      </div>

      <footer className="w-full border-t border-t-foreground/10 p-8 flex justify-center text-center text-xs">
        <p>
          Powered by{' '}
          <a
            href="https://supabase.com/?utm_source=create-next-app&utm_medium=template&utm_term=nextjs"
            target="_blank"
            className="font-bold hover:underline"
            rel="noreferrer"
          >
            Supabase
          </a>
        </p>
      </footer>
    </div>
  )
}