api.my.geatapim/live/?action=login_user&username=joe@bloggs.com&password=PassWord&session_length=10080

<?php

$request_string = "api.my.geatapim/live/?action=login_user&username=joe@bloggs.com&password=PassWord&session_length=10080";
echo $request_string = preg_replace("/password=w+/", "password=OBFUSCATED", $request_string);
?>