Login / Registration Tutorial?

[eluser]wefowebwougbwegb[/eluser]
Hey,

I'm kinda new to Code Igniter and i am having some problems, When i first started learning PHP, i learnt most of it by making scripts, and one of the first was a User Login/ Registration, But I'm not sure how to do this with CI, can anyone link me to a tutorial or tell me how?

thanks