Wordpress wordpress stop user enumeration

not entirely sure what you mean by user enumeration ?

 

i think that answers your question security - Can I Prevent Enumeration of Usernames? - WordPress Development Stack Exchange

so you can't if you want wordpress friendly urls

if you use centminmod 123.09beta01 wordpress install via centmin.sh menu option 22 you can sort of work around it for admin user as the installer gives you an option to set the admin displayed username which will be different from wp login username Wordpress Nginx Auto Installer (WP Super Cache). You can also change the display names manually via profile edits on wordpress.

edit: also try in main root location / context of wordpress vhost add

Code (Text):

if ($args ~ "^author=\d") { return 403; }

or 444 return error code as wpscan deems 403 as a valid code

Code (Text):

if ($args ~ "^author=\d") { return 444; }