CI4 User Authentication System

thats the wrong link for the current version of ci ion auth - correct link is:
https://github.com/benedmunds/CodeIgniter-Ion-Auth

Well i know the correct link to the Codeigniter 3 specific Ion Auth package.
The reason i've linked that other one is that it is not specific to Codeigniter and is already psr-4 compliant.

I know that the last update in that repository was done in 2015, that is why i suggested that it could probably be forked and updated to current requirements and maybe kept framework agnostic.
ben has confirmed that the project is completely abandoned...

I believe that if an auth library is kept framework agnostic there is a higher chance of other developers contributing to it as well, hopefully raising the quality of the code.