This constant manages the expiration time of the session that is set for each visitor individually. This session prevents excessive API calls and it lasts until a defined expiration time is reached or IP address is changed.
Source
File: /cf-geoplugin/globals/cf-geoplugin-setup.php
if(!defined('CFGP_SESSION'))
{
define('CFGP_SESSION', 30); // 30 minutes
}
Session expiration time is defined in minutes.
Example
These constant can be modified within your wp-config.php file:
define('CFGP_SESSION', 60); // Set to 60 minutes