CodeIgniter初学者认证库?

Can anyone recommend a great CodeIgniter Registration/Login/Logout library for beginners to web development?

I read on stackoverflow that Redux was highly recommended at one time. What is the current recommendation?

I highly recommend Ion Auth Library which can be found here:

http://github.com/benedmunds/CodeIgniter-Ion-Auth

It is very secure, a lot of good features for an auth library, and developed by a really nice guy.