How To Add Authentication Using Auth.js?

How To Add Authentication Using Auth.js?


Hey folks, in today's article we'll explore how to authenticate users on any WebApp using Auth.js and Next.js. Next.js, a popular React framework for building web applications, can be seamlessly integrated with Auth.js to provide robust authentication and authorization capabilities. This article will guide you through the process of using Next.js with Auth.js to build secure and user-friendly web applications.

What is Next.js?

Next.js is a React framework that simplifies the process of building server-rendered React applications. It provides a powerful development environment, improved performance, and SEO benefits out of the box. Next.js allows developers to create dynamic web applications that can be easily deployed and scaled.

Read more by clicking here.

What is Auth.js?

Auth.js is a JavaScript library developed by Auth0 that simplifies the implementation of authentication and authorization in web applications. It offers a set of tools and components to handle user authentication, identity management, and access control. Auth0 provides authentication as a service, making it easy to integrate authentication into your application without having to manage complex backend systems.

Read more by clicking here.

Getting Started

Before we dive into the integration process, ensure you have the following prerequisites:

  • Node.js and npm are installed on your machine.

  • A Next.js application is set up and running.

  • An Auth0 account with a configured application.

Let's begin by integrating Auth.js into your Next.js application-

  1. Install Auth.js Library-
npm install next-auth
  1. Configure Auth0-

Log in to your Auth0 dashboard and create a new application. Note down the Client ID and Domain values from your Auth0 application settings. These will be used to configure Auth.js in your Next.js application.

  1. Setup Auth.js-

The File Directory should be- pages/api/auth/[...nextauth].ts

import NextAuth from "next-auth"
import GithubProvider from "next-auth/providers/github"

export default NextAuth({
  providers: [
      clientId: process.env.GITHUB_ID,
      clientSecret: process.env.GITHUB_SECRET,

Replace process.env.GITHUB_ID and process.env.GITHUB_SECRET with the values from your Auth0 application.

Give a read here to know more!

  1. Integrate Auth.js Into Your Next.js Pages-

Now, you can integrate Auth.js into your Next.js pages. For example, let's create a protected route that requires authentication:

The File Directory should be- pages/_app.tsx

import { SessionProvider } from "next-auth/react"
import type { AppProps } from "next/app"

export default function App({
  pageProps: { session, ...pageProps },
}: AppProps) {
  return (
    <SessionProvider session={session}>
      <Component {...pageProps} />
  1. Consuming The Session Via Hooks-

You can use the useSession hook from anywhere in your application (E.g. in a header component). Behind the scenes, the hook will connect to the <SessionProvider /> to read the current user session. Learn more about React Context in the React docs.

The File Directory should be- pages/overview.tsx

import { useSession, signIn, signOut } from "next-auth/react"

export default function CamperVanPage() {
  const { data: session, status } = useSession()
  const userEmail = session?.user?.email

  if (status === "loading") {
    return <p>Hang on there...</p>

  if (status === "authenticated") {
    return (
        <p>Signed in as {userEmail}</p>
        <button onClick={() => signOut()}>Sign out</button>
        <img src="" />

  return (
      <p>Not signed in.</p>
      <button onClick={() => signIn("github")}>Sign in</button>

In this article, we've explored how to use Next.js with Auth.js to add authentication and authorization to your web applications. By integrating Auth.js into your Next.js project, you can provide a secure and seamless authentication experience for your users. Remember to customize your authentication flow and user interface to match your application's specific requirements and design.

With Next.js and Auth.js, you can build feature-rich, secure web applications while focusing on the core functionality of your app without worrying about the complexities of authentication and authorization. Happy coding!

I hope that you must have found this article quite helpful. If yes, then do give a read to some of my other articles!

Who knows you might become a great programmer 🤔!