Complete Guide to Next.js App Router Authentication

This comprehensive guide will walk you through everything you need to know about implementing this feature in your Next.js application.

Prerequisites

• Node.js 18+ installed
• Basic understanding of React and Next.js
• A Next.js 14+ project with the App Router

Step 1: Project Setup

First, let's set up the necessary dependencies and configuration for our project.

npm install @auth/nextjs bcryptjs
npm install -D @types/bcryptjs

Step 2: Implementation

Now we'll implement the core functionality. This involves creating the necessary API routes, middleware, and client components.

Step 3: Testing

Always test your implementation thoroughly before deploying to production. Here are the key scenarios to verify.

Conclusion

You now have a fully functional implementation. Check out the related guides below for more advanced patterns and optimizations.