I've successfully removed my author slug using this tutorial: https://wp-snippet.com/snippets/remove-author-prefix-from-slug/
so it's like website.com/author/cixxy to website.com/cixxy
My question is, if I have an existing page like website.com/readme , and a new user registers as readme nickname, then his author page will just redirect to the readme page.
Or if they registered already, then I won't be able to use that nickname for a page anymore, right? So if they registered as "Contact" username, I won't be able to have a /contact slug.
How can I prevent this? I see behance.net, facebook etc using both pages as the root and also users, so I'm guessing there has to be a way.