otp-verification

Implementing OTP verification in Django involves generating time-limited codes, sending them via Twilio SMS, and validating user input against stored codes with configurable expiry windows and attempt limits.

Phone-based rate limiting for OTP authentication is best handled by enforcing per-IP and per-phone-number request limits, combined with detailed audit logging of OTP requests to deter abuse and support investigations.

OTP verification issues JWT tokens by validating the user's input code against the backend's stored OTP, and upon successful match within the expiry window, generating and returning JWT tokens to establish the mobile app session.

Yes, you can use Django and Twilio for passwordless customer authentication by generating one-time codes, delivering them via SMS, and verifying the codes to issue session tokens, removing the need for traditional passwords.

Limitations of OTP verification include strict rate limits per IP and phone number to prevent abuse, alongside a fixed 10-minute code expiration window, meaning expired or over-requested codes will be rejected.

Yes, a separate service layer is needed to manage OTP generation and logging, acting as an intermediary between Django models and endpoints to handle SMS delivery, rate limiting, and secure verification logic.