nextauth

Implement NextAuth/Auth.js v5 authentication with OAuth providers and protected routes in Next.js apps.

Updated Apr 12, 2026
One-click install
npx skills add https://github.com/gil00pita/lanify --skill nextauth-gil00pita
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: nextauth
Source: https://github.com/gil00pita/lanify/tree/main/.agents/skills/nextauth
Command: npx skills add https://github.com/gil00pita/lanify --skill nextauth-gil00pita

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

NextAuth/Auth.js v5 provides a flexible, scalable authentication solution for Next.js apps, enabling OAuth providers, credentials, session management, and route protection with a unified API.

Core Features & Use Cases

  • Supports 80+ OAuth providers and database adapters for flexible authentication strategies.
  • Includes server-side and client-side session handling, middleware protection, and customizable callbacks.
  • Use cases include protecting dashboards, gating API routes, and enabling social or credential-based sign-in flows.

Quick Start

Install next-auth, configure providers and callbacks in your app, and wire up the handler routes to protect pages and API routes.

Frequently Asked Questions about nextauth

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I add authentication to a Next.js app?

Protecting Next.js routes uses middleware and server-side session handling to gate dashboards and API routes. Auth.js v5 enables this by validating user sessions before rendering protected pages or processing requests.

Can I use credential-based sign-in instead of OAuth in Next.js?

Auth.js v5 handles session management through server-side and client-side methods, ensuring secure user state persistence across your application. It manages session tokens and validates user authentication state for protected routes.

Does NextAuth support database adapters for session storage?

Customizing authentication callbacks in Auth.js involves defining functions to control session content and redirect behavior after sign-in. You configure these customizable callbacks during your initial provider setup to tailor user flows.

What is the best way to gate API routes in a Next.js application?

Social sign-in flows in Next.js utilize configured OAuth providers to authenticate users through external platforms. Auth.js v5 manages the OAuth exchange, returning secure sessions to your application after successful provider authentication.

How does middleware route protection work in Next.js authentication?

Configuring OAuth providers in Next.js requires defining provider credentials and callback URLs within your Auth.js setup. You instantiate providers like Google or GitHub to enable social sign-in flows for your application users.

Do I need a database to use Auth.js v5 for Next.js authentication?

Protecting dashboards in Next.js uses server-side session validation and middleware to restrict access to authenticated users. Auth.js v5 enables this by checking session state before rendering secure dashboard pages.