AuthController implements user config

[MGatner]

There are a few places that loaded the Myth config file directly. Probably need some better way of handling this centrally (like perhaps having them all call the service, which would need a getConfig() command?). For now this fixes AuthController to check for a user config file in order to use the $allowRegistration property properly.

[lonnieezell]

Ok - that's something I didn't think about with your other PR, but the config() helper in CI4 does handle caching those for performance reasons, so this wouldn't be needed if we instead fix the order in CI4.

[MGatner]

Okay, I think I figured this one out. First, we were calling config(Auth::class) but since the namespace of Services.php is Myth\Auth\Config it was using Myth\Auth\Config\Auth so that wasn't going to work. Passing 'Auth' as a string in theory would do it, but config()(with $getShared) passes the un-namespaced string to $locator->locateFile which causes it to use legacyLocate() - which is App and System only.

I'll work on a PR of how I think this should be handled, then we can revisit Myth:Auth and (hopefully) just use config('Auth') everywhere.

[MGatner]

FYI: codeigniter4/CodeIgniter4#2079

[lonnieezell]

That PR has been merged. Thanks!

[MGatner]

Redoing this to take advantage of the updated config() functionality.