Add a layer of security and prevent your login name from being shown in the author archive&#039;s URL.

WP Author Slug

This plugin replaces the author slug with a sanitized version of the user&#8217;s display name.
This plugin will not prevent hackers from finding out your login name but the login name won&#8217;t be visible 
in the author archive&#8217;s URL, which works towards your friendly URLs with using your display name.
DO NOT use this on a site with more than 1000 registered users, as updating all of their nicenames at once might break your site.

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