Web Development•8 min read

Authentication in Next.js Using NextAuth (Full Implementation)

Aditya Kumar

Frontend Architect

Feb 28, 2026

Authentication in Next.js Using NextAuth (Full Implementation)

Setting up NextAuth

NextAuth.js handles session management for you without needing a complex backend.

typescript

// app/api/auth/[...nextauth]/route.ts
import NextAuth from "next-auth"
import GoogleProvider from "next-auth/providers/google"

const handler = NextAuth({
  providers: [
    GoogleProvider({
      clientId: process.env.GOOGLE_CLIENT_ID,
      clientSecret: process.env.GOOGLE_CLIENT_SECRET,
    }),
  ],
})

export { handler as GET, handler as POST }

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