Hi,
thank you for the library. It really improved the way I approach configuration files.
Finally I have types and proper sections.
What I am missing is schema: I would love to be able to enforce that some parameters are obligatory, their type and provide a description, also raise an exception if there is some unknown parameter is configured.
I think I could use something like marshmallow

We are already able to customize the dictionary of messages simplelogin flashes. However, there is no easy way to:

1. Toggle messages on and off
2. Customize the categories of the flashes

Toggling could be useful if the user has implemented a custom login checker function, or if the user doesn't want to flash these messages. Custom categories could be useful for projects structured with diffe