Use a real login system, not one you wrote yourself - shippingszn launch readiness

How users sign in, receive verification codes, recover paid access, and stay signed in. Done well, only the real user can get into their account. Done badly, an attacker can guess codes, enumerate customers, abuse SMS/email delivery, steal sessions, or read passwords straight out of your database.

If your login or OTP flow is weak, every other security thing you did doesn't matter — the attacker just walks in the front door or your paid users get locked out. The good news: you almost never need to build login from scratch. Use a proven provider and let shippingszn scan for the launch risks AI builders usually miss.

The shippingszn CLI includes automated checks for this launch-readiness control.

The Launch Fix Kit keeps scan-specific findings, file and line evidence, AI-builder punch-list tasks, and verification steps tied to the paid report.

Use a real auth provider (Clerk, Auth0, Supabase Auth, Stytch, or your platform's built-in auth like Replit Auth) instead of writing it yourself. Your AI builder can wire one up in a single prompt.
Never store passwords directly. Real auth providers store a one-way scrambled version (a hash) so even they can't read it.
Turn on rate limiting on login (max 5 wrong attempts in 15 minutes) so attackers can't sit there guessing forever.
If you use email or SMS OTP, normalize phone numbers, add resend cooldown copy, use generic success-shaped start responses, and smoke a real delivered code before launch.
If paid report or purchase access depends on OTP, add a recovery path: alternate contact, receipt/support handoff, or purchase history.

Run the scanner | Unlock Launch Fix Kit

Canonical URL: https://shippingszn.com/i/secure-auth/