Scripted Rest Resource when trying to call SLACK API

[nicholascer]

I am trying to integrate Slack with my PDI in such a way that, when i type in the slash command "/incident <INC-number>" I am able to pull forward details about that incident.

I have created a Scripted REST Resource and Scripted Rest Service to handle this.

I have set the Request URL for my slack app to point to "https://<my-instance>.service-now.com/api/<namespace>/slack_incident_lookup/incident_status"

However I am finding that my command and integration is not working. Below is the script I am using, as well as screenshots of my field setups.

Can anyone provide me with tips on how to troubleshoot this, what I might be doing wrong?

Script:

(function process(/*RESTAPIRequest*/ request, /*RESTAPIResponse*/ response) {
var parameters = request.queryParams;
var number = parameters.number;
var body = {};

if(!number) {
response.setStatus(400);
body.error = "Missing 'number' parameter";
response.setBody(JSON.stringify(body));
return;
}

//if input provided matches an existing incident, then populate the response body with Number,Short Description, State, and Assignee information


var incident = new GlideRecord('incident');
if(incident.get('number', number)){
body = {
number: incident.number.toString(),
description: incident.short_description.toString(),
status: incident.state.getDisplayValue(),
assignee: incident.assigned_to.getDisplayValue()
};
} else{
body.error = "Incident not found: " + number;
}
response.setHeader('Content-Type', 'application/json');
response.setStatus('200');
response.setBody(JSON.stringify(body));
})(request, response);

NOTE: 

something odd I've notice is that when I leave relative field as '/' the System Logs will return an error message 

Requested URI does not represent any resource: /<namespace>/slack_incident_lookup/incident_status: no thrown error​

But when I populate the relative field on the form as 'incident_status' it does not return any error on the system log, but still does not work.