How to send push notification to Customer Portal mobile app?

How to send push notification to Customer Portal mobile app?

Hello,

I am trial user and trying to send push notification to Customer Portal mobile app but notification not coming. 

I did it according to this: https://www.zoho.com/deluge/help/pushnotify-using-deluge.html 

  1. zoho.pushNotification({"overlapsro@gmail.com"},"New feedback received","Click to view the record","Pr_ce_Report",input.ID);
Could anyone help me out please?

Thank you in advance :)

Mira