TOPIC:

I cant find any OTP module for webtree? Are there any?

I would like to include this as module on login page or registration page. How do I do that. Can I add this as custom module

phppot.com/php/php-login-with-otp-authentication/

The code on that page is appalling.
It contains serious security vulnerabilities.
Please do not use it - either directly or as a tutorial.

It would be straightforward to write a module to create such a "magic link" login system, although I am not aware of one.

I do plan to update the login system. But like many changes, it will be easier if we can make some database changes first - and I am currently working on that.