The easiest way to create authentication in 2 min with NextJs & Auth0

Aren't you sick of having to authenticate users with long codes and dirty back-end work?

Here's the quickest way to do it in under 2 minutes.

Demo :

Live Preview

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Setup

1. Go to Auth0 SignUp or Login

2. Click on Applications

3. Click on Applications

4. Click on Create Application

5. Paste name of the app into input

6. Click on Regular app

7. Click on Create

8. Click on Settings

9. Type http://localhost:3000/api/auth/callback

10. Type http://localhost:3000

Note when you will deploy this app you should change the url to
http://locahost:3000/api/auth/callback to http://yourdomain.com/api/auth/callback
Same for Logout URL's

11. Click on Save Changes

12. Scroll up take note of your domain , client id and client secret

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Now create a Nextjs App

1 . yarn create next-app

2 . Create .env.local and paste your secrets here

# A long, secret value used to encrypt the session cookie use any random 32 character string
AUTH0_SECRET = 'LONG_RANDOM_VALUE'

# The base url of your application
AUTH0_BASE_URL= 'http://localhost:3000'

# The url of your Auth0 tenant domain
AUTH0_ISSUER_BASE_URL = 'https://YOUR_AUTH0_DOMAIN.auth0.com'

# Your Auth0 application's Client ID
AUTH0_CLIENT_ID = 'YOUR_AUTH0_CLIENT_ID'

# Your Auth0 application's Client Secret
 AUTH0_CLIENT_SECRET = 'YOUR_AUTH0_CLIENT_SECRET'

3 . Install @auth0/nextjs-auth0 SDK

npm install @auth0/nextjs-auth0
# Or
yarn add @auth0/nextjs-auth0

4 . Get your environment variables

5 . Step copy your secrets to .env.local

6 . Go to pages/api/ create a new file auth/[...auth0].js this will create folder auth and file [...auth0].js

[...auth0]js to catch all slug so we can use same route for login and logout

Now paste the following code in your auth/[...auth0].js file

import { handleAuth } from "@auth0/nextjs-auth0";

export default handleAuth();

7. Wrap your pages/_app.js component with the UserProvider component.

// pages/_app.js
import React from "react";
import "../styles/globals.css";
import { UserProvider } from "@auth0/nextjs-auth0";

export default function App({ Component, pageProps }) {
  return (
    <UserProvider>
      <Component {...pageProps} />
    </UserProvider>
  );
}

8 . Now lets implement this inside our pages/index.js page

// pages/index.js
import { useUser } from "@auth0/nextjs-auth0";

export default function Index() {
  const { user } = useUser();

  if (user) {
    return (
      <div>
        Welcome {user.name}! <a href="/api/auth/logout">Logout</a>
      </div>
    );
  }

  return <a href="/api/auth/login">Login</a>;
}

9 . Now Run your nextjs app via

npm run dev
#Or
yarn dev

10 . Now you can login to your app and also be able to logout

Walla your authentication is done 🎊🔥 .

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So you can see it in action, I've put some design to it.

Check out the Github Repo

Live Demo :

Auth0-Nextjs

Additional features, such as page protection and others, can be added.
Check out the official SDK repo for further information.

Official SDK repo