Other documentation?

First, thanks for your time and effort supporting this plugin here.

Just curious if there is any other documentation out there because the docs linked here are only partially useful unless we want to dig through code.

It kind of reminds me of this: https://imgur.com/rDOj051 (hwo-to-draw-a-horse.jpg)

For example, I know I have the shortcode option to define the “default_action” and that the default value for that is “login” but no other information about what other values are accepted with that attribute key or other attribute keys for that matter. Where do we find that missing half of the info?

It seems like a lot of the documentation is done this way, i.e. provide the first half of the info, i.e. the action, filter, attr option but only a brief description of what it is. Am I missing something right under my nose? Thx