Stop Building Auth From Scratch in Next.js (2026 Guide)

I built auth from scratch five times. Each time: 3-5 days. Each time I swore never again. The 60-line solution with Auth.js v5: import NextAuth from " next-auth " ; import { PrismaAdapter } from " @auth/prisma-adapter " ; import Google from " next-auth/providers/google " ; import GitHub from " next-auth/providers/github " ; import Credentials from " next-auth/providers/credentials " ; import { db } from " @/lib/db " ; export const { handlers , signIn , signOut , auth } = NextAuth ({ adapter : PrismaAdapter ( db ), session : { strategy : " jwt " }, pages : { signIn : " /login " }, providers : [ Google ({ clientId : process . env . AUTH_GOOGLE_ID , clientSecret : process . env . AUTH_GOOGLE_SECRET }), GitHub ({ clientId : process . env . AUTH_GITHUB_ID , clientSecret : process . env . AUTH_GITHUB_SECRET }), Credentials ({ credentials : { email : { type : " email " }, password : { type : " password " } }, async authorize ( creds ) { if ( ! creds ?. email || ! creds ?. password ) return nu