How to use Channel integration

I posted the question befire but I think this is different issue so I post this as a new question

I'm following this guide https://www.zoho.com/desk/extensions/guide/

I want in use Channel integration feature with my API to create tickets.

Is it correct if I just want that feature only so I can do by using Resources.json alone without touching anything else?

My Resources.json is

   {
  
   "channel": {
  
   "channelLogoPath" : 
   "/app/img/logo.png",
  
   "acceptAttachments" : 
   false,
  
   "updateRecords" : 
   true,
  
   "contentTypes" : [
   "text/plain",
   "text/html"],
  
   "redirectUrl" : 
   "xxxxxxxxxxxxx",
   
   "includeQuotedMessage": 
   false,
  
   "sync": {
  
   "push": 
   "xxxxxxxxxxxxxxxxxxx",
   
   "pull": 
   "xxxxxxxxxxxxxxxxxxx"
   
    }
  
    }
  
   }

But I tried to test in devmode and prod seems like my extension didn't do anything

Did I miss something? And how can I debug this?

Please help.