authentication▌

Implement comprehensive authentication strategies for APIs including JWT tokens, OAuth 2.0, API keys, and session management with proper security practices.

Provides authentication implementation patterns for Next.js 15+ App Router using Auth.js 5 (NextAuth.js), covering the complete authentication lifecycle from initial setup to production-ready role-based access control implementations.

You are an expert in NextAuth.js (Auth.js v5) authentication implementation. Follow these guidelines when integrating authentication in Next.js applications.

A comprehensive skill for implementing secure authentication and authorization using OAuth2 and OpenID Connect. This skill covers all major authorization flows, token management strategies, security best practices, and real-world implementation patterns for web, mobile, and API applications.

Identify and exploit authentication and session management vulnerabilities in web applications. Broken authentication consistently ranks in the OWASP Top 10 and can lead to account takeover, identity theft, and unauthorized access to sensitive systems. This skill covers testing methodologies for password policies, session handling, multi-factor authentication, and credential management.

Complete authentication and authorization system with JWT, OAuth, and role-based access control. \n \n Covers five core authentication methods: JWT tokens, session management, OAuth 2.0, password hashing (bcrypt/argon2), and multi-factor authentication support \n Includes step-by-step implementation for user registration, login, token refresh, and logout endpoints with database schema design \n Provides authentication middleware for protecting API routes and role-based authorization for permissi