Logic of controllers and how to seperate them

[eluser]n0xie[/eluser]
Well you said it yourself: the auth controller has everything to do with users logging in, logging out and retrieving their password.

So this is a good example of bundling up related functionality into one controller.

Now I ask you, what does messaging have to do user authentication? In my book, not much. So I would bundle all matters relating to messaging into one controller.