Implement Auth0

Auth0 is another popular provider that supports enterprise-level features like single sign-on, passwordless logins, and a robust rules engine. Integrating it with NextAuth is straightforward.

Steps to Integrate Auth0

1. Create an Auth0 Application

   • Sign in to Auth0 Dashboard.

   • Create a new application under the Applications section (choose "Regular Web App").

2. Retrieve Credentials

   • Under your Auth0 application settings, you’ll find Client ID, Client Secret, and Domain (sometimes referred to as issuer in NextAuth).

3. Add Environment Variables

AUTH0_CLIENT_ID="your-auth0-client-id"
AUTH0_CLIENT_SECRET="your-auth0-client-secret"
AUTH0_ISSUER="https://your-tenant-id.auth0.com"

4.	Configure the Auth0 Provider in NextAuth

import Auth0Provider from 'next-auth/providers/auth0'

providers: [ Auth0Provider({ clientId: process.env.AUTH0_CLIENT_ID, clientSecret: process.env.AUTH0_CLIENT_SECRET, issuer: process.env.AUTH0_ISSUER, }), // ...other providers ]

5.	Redirects & Allowed URLs

In your Auth0 application settings, ensure your allowed callback/logout URLs match your app’s domain. For local development, you might add something like:

http://localhost:3000/api/auth/callback/auth0

as an allowed callback URL.

6.	Test Your Integration
•	Head to your sign-in page or wherever you trigger signIn('auth0').
•	Upon success, you should be redirected back to your Next.js site with the user session now stored in your Prisma-backed database.

Auth0 Benefits • Advanced Security & Enterprise Options: Great for companies that need SSO, multi-factor authentication, or specialized compliance. • Customizable Login Pages: Tailor your login experience to match your brand. • Rules & Hooks: Insert custom logic during the Auth flow (e.g., for user metadata).

That’s it! You now have a secure integration with Auth0. For more advanced options like Role-Based Access Control or multi-tenant setups, refer to the Auth0 Docs.

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Final Thoughts

With these three separate files:

• intro.md covers the overall NextAuth + Prisma + Next.js setup.

• providers.md explains how to integrate Google and other common OAuth providers, plus shows code examples for getting the session.

• auth0.md focuses on setting up Auth0 specifically, including environment variables and callback URLs.