Change Base Url CodeIgniter and Ionauth

Change Base Url CodeIgniter and Ionauth

This is probably a really simple question but I am entirely new to
codeigniter. I am using ionauth for a secure account system but I would
like to change the url path, simply changing the class name is not
working, it simply gives me a 404 whenever I try access it. I am trying to
change the /auth/ location to /account/ but when I try it by just renaming
class Auth extends CI_Controller { to class Account extends CI_Controller
{ it does not work as expected.
Any suggestions are greatly appreciated, Again I am new to this so please
go easy it's probably a simple fix and me not know code igniter very well.
Thanks, Simon