mcrypt_get_iv_size() is DEPRECATED

[chrisduk112]

This module has issues with PHP 7.2/PHP7.2 which we are using for WHMCS and all of our other many addons.

the error is:

Error: Call to undefined function mcrypt_get_iv_size() in /WHMCS_PATH/modules/servers/onappusers/onappusers.php:948

it seems mcrypt_get_iv_size() is DEPRECATED as of PHP 7.1 (see http://php.net/manual/en/function.mcrypt-get-iv-size.php)

Can this module be fixed ASAP to use a modern method to replace mcrypt_get_iv_size()