Is it possible to access account data from twig variables?

I'm in the process of creating a multi-author blog and was hoping to include author data that could be entered by each individual. Presumably, the best place to store data like that would be inside their user/accounts/USERNAME.yaml file. This brings up two questions:

1. Is this data accessible through the standard variables in Twig?
2. Can I then create a blueprint to add a UI for entering this data in using the Admin Panel?

Any insight?

You can build a little plugin that provides the data you need by looking up the author, providing something like {{ authors[page.header.author_name].bio }}

The best I think is to store that info in site.yaml https://learn.getgrav.org/basics/grav-configuration#site-configuration, which can be extended with your own fields