Secure authentication implementation patterns. Use when implementing user login, registration, password reset, session management, JWT authentication, OAuth, MFA, or passkeys. Provides production-ready patterns aligned with NIST SP 800-63B-4, OWASP 2026 cheat sheets, OAuth 2.1, and WebAuthn L3, with
Secure authentication implementation patterns. Use when implementing user login, registration, password reset, session management, JWT authentication, OAuth, MFA, or passkeys. Provides production-ready patterns aligned with NIST SP 800-63B-4, OWASP 2026 cheat sheets, OAuth 2.1, and WebAuthn L3, with breach-driven lessons.