Add more common usernames

Is your enhancement related to a problem? Please describe.

Too few "common" usernames.

10up-experience/includes/classes/Authentication/Usernames.php

Lines 55 to 68 in 1ef974f

    
           $common_usernames = array( 
        
           	'admin', 
        
           	'administrator', 
        
           	'user', 
        
           	'username', 
        
           	'demo', 
        
           	'sql', 
        
           	'guest', 
        
           	'root', 
        
           	'test', 
        
           	'mysql', 
        
           	'ftp', 
        
           	'www', 
        
           	'client',

Designs

Mailchimp publishes a useful list.
https://mailchimp.com/help/limits-on-role-based-addresses/
Role-Based Addresses

Also viktor runs a list
https://github.com/szepeviktor/waf4wordpress/blob/5938f721e6cb23562b4f2bdae44ef57c68ea3d00/src/CoreEvents.php#L59-L95

You may copy all of them!

Code of Conduct

I agree to follow this project's Code of Conduct

Thanks @szepeviktor, I'll take a look into this. I appreciate the linked resources!

Thank you.

	$common_usernames = array(
	'admin',
	'administrator',
	'user',
	'username',
	'demo',
	'sql',
	'guest',
	'root',
	'test',
	'mysql',
	'ftp',
	'www',
	'client',