andreacomo

Want to protect resources in a folder only to registered users in your WordPress installation? This plugin sync any WP users with Apache basic authentication system file-based automagically: accessing protected resources will prompt for WordPress account credentials
<h3>Advanced options</h3>
If you want to protect resources with WordPress credential on another server, you can provide FTP credentials: 
this plugin will take care to copy <code>.htpasswd_generated</code> to remote server. It’s up to you then to configure Apache <code>.htaccess</code> file propertly.

WordPress .htpasswd Generator

Sync your WordPress users with .htpasswd file for enabling Apache (2.2.18 and above) basic authentication based on file for your resources

Sebastian Weiß

Lightweb Media Basic Authentication is a plugin for protected your development WordPress site like .htpasswd. 
The Plugin supported an localhost bypass for the wp-cli and an mu-plugin creation for Rollbacks.
Features:
<ul>
<li>Easy for setting Basic Authentication</li>
<li>Basic Authentication works like .htpasswd</li>
<li>Protected development website or demo website without .htpasswd</li>
<li>Support Docker and Kubernetes (K8s)</li>
<li>The plugin is lightweight.</li>
<li>Create mu-plugin for rollbacks</li>
<li>Allow Bypassing for localhost (for WP-CLI)</li>
</ul>

Lightweb Media Basic Authentication

Lightweb Media Basic Authentication for protected your development WordPress site like .htpasswd

WordPress .htpasswd Generator vs Lightweb Media Basic Authentication