If you would like to block access to the WordPress admin area for all the people except you, you can block access for all the IPs and whitelist your IP only.
Please add the code below in (.htaccess) file:
<IfModule mod_rewrite.c>
RewriteEngine on
RewriteCond %{REQUEST_URI} ^(.*)?wp-login\.php(.*)$ [OR]
RewriteCond %{REQUEST_URI} ^(.*)?wp-admin$
RewriteCond %{REMOTE_ADDR} !^123.123.123.123$
RewriteRule ^(.*)$ - [R=403,L]
</IfModule>
Replace the example IP address with your own IP address.
Please make sure that you are using our Nameservers (ns1.hostilica.net) and (ns2.hostilica.net), because if your site is running behind Cloudflare, the IP restrictions you make here will be invalid.