NextAuth.js handles authentication complexity in Next.js applications. Support OAuth providers, credentials, and magic links. Database adapters store sessions and users. Callbacks customize authentication flow.
Provider Configuration
Configure OAuth providers with client IDs and secrets. Add credentials provider for email/password. Implement custom providers for specific needs. Combine providers for user choice.
- Configure OAuth providers for social login
- Use database adapters for session persistence
- Customize callbacks for authorization logic
- Protect API routes with getServerSession
- Implement role-based access in callbacks
Session Management
JWT sessions store data in tokens. Database sessions enable server-side logout. Configure session duration and refresh. Access session data in server and client components.