how to restrict incident creation from calendar invites for DL

[RudhraKAM]

As of now we are creating an Incidents via Inbound action , but when there is a calendar invite , still it is creating Incident , How to restrict that ?

I am not able to restrict subject , as it can be any 

[pratyusha11]

if (elidProperty) {
    // Process comma-separated values exactly like the recipient script
    var ids = elidProperty.split(',').map(function(id) {
        return id.trim();
    }).join(',');

    var userGR = new GlideRecord('sys_user');
    var qc = userGR.addQuery('u_elid', 'IN', ids);
    qc.addOrCondition('user_name', 'IN', ids);
    
    userGR.query();
    if (userGR.next()) {
        username = userGR.name.toString();
    }
}