Tutorials and examples about auth business rules

I’ve a lot of confusion about business rules in Auth “stuff”, I’d like to learn more: where can I find some material to study? like tutorials, wikis and examples.

I’m actually using Rights extension, but I think there’s no much difference with other modules, so wikis written for other extensions could be useful too. Thank you!

The guide should be your first stop.

ok, cool! what’s the second?

May be here.