B2C SLAS Authentication Patterns Advanced authentication patterns for SLAS (Shopper Login and API Access Service) beyond basic login. These patterns enable passwordless authentication, hybrid storefront support, and system-to-system integration. Authentication Methods Overview | Method | Use Case | User Experience | |--------|----------|-----------------| | Password | Traditional login | Username + password form | | Email OTP | Passwordless email | Code sent to email | | SMS OTP | Passwordless SMS | Code sent to phone | | Passkeys | FIDO2/WebAuthn | Biometric or device PIN | | Session Bridge…