TN Authenticator

TN Authenticator is a lightweight WordPress plugin that adds email-based PIN login to a site.

The plugin creates a dedicated /login-pin page where users enter their email address, receive a one-time 4-digit sign-in code, and use that code to log in without a password. It also adds a “Login with PIN?” link to the standard WordPress login screen.

Core features include a plug-and-play login route, shortcode support, one-time email PINs, secure PIN hashing, expiry handling, attempt limits, rate limiting, honeypot protection, generic user messages to prevent account enumeration, and GitHub-based plugin updates.

The approach is intentionally simple. TN Authenticator does not try to replace WordPress authentication, become a full SSO platform, or introduce a complex identity layer. It gives known users a low-friction way to sign in when passwords are unnecessary, inconvenient, or likely to create support overhead.

For most operational websites, that is the right level of login improvement. Teams often need easier access for trusted users, not a heavy authentication platform. TN Authenticator keeps the experience familiar, reduces password friction, and adds a practical login path without over-engineering the site.