Recommendations for managing custom application settings

I’m looking to put together a simple form with a handful of options for configuring my ALEOS AAF application on an RV50 modem. Are there any software modules that would allow leveraging the existing ACEManager/user management built into the device, then adding a custom form for my application config?

If not, are there any lightweight lua web frameworks that I can drop into ALEOS AAF as modules that will support basic authentication, form handling, etc?