If you’re unable to install an SSL certificate on your web server or are just too cheap to buy your own ($10+ per year per website), you can still force all WordPress logins to use the secure HTTPS protocol.
Note: If you already have your own SSL certificate installed, all you need to do is use the FORCE_SSL_LOGIN wp-config.php constant. You don’t need this plugin.
How to setup the Https-SSL-free plugin
Install and activate the Https-SSL-free plugin.
Upon plugin activation, it will change your WordPress Site URL setting from http://example.com to https://example_com.1.com.ar and log you out.