User authentication HOWTO

[eluser]Unknown[/eluser]
Hi all,

I'm fairly new to PHP and am having a great time with CodeIgniter making a database for a club I'm in.

Is there a howto, recommended procedure, or suggestions on how to enable security (authorisations, authentication etc) for a CodeIgniter application?

I would like something where I could create user accounts, users could login, then be given access depending on group membership. Or less preferably, but still acceptable, would be to have generic login accounts.

It would seem to be a fairly standard bit of functionality, so I'm hoping there's a suitable helper or something that will get me going.

Many thanks,

Greg