spt-magento/src/app/code/MNM/RevocationForm/etc/frontend/routes.xml

<?xml version="1.0"?>
<!--
/**
* Copyright © 2016 Magento. All rights reserved. * See COPYING.txt for license details.
*/
-->
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:App/etc/routes.xsd">
    <router id="standard">
        <route id="revocation" frontName="revocation">
            <module name="MNM_RevocationForm" />
        </route>
    </router>
</config>