How to setup a Callback URL
Setting up a callback URL will enable the EasyDNNsimpleForum module to receive notifications (callback) from the Facebook app whenever someone adds or deletes a comment. This will help the EasyDNNsimpleForum module to keep track of added/deleted comments and count them properly.
To be able to setup a callback URL your website must use the HTTPS protocol. First login to you Facebook developers account and open your application. From the sidebar menu select “Add Product” and then “Webhooks”.
From the dropdown menu select “Application” and then click on the “Subscribe to this topic” button. This will open a popup dialog containing some information about the application subscription.
In the pop-up dialog enter your “Callback URL” and a value for the “Verify Token” field. Under “Verify Token” you can enter any value of your choice. The callback URL value is your domain plus “/DesktopModules/EasyDNNsimpleForum/API/Facebook/ApplicationCallback/”. For this example the callback URL is:
https://simpleforumtest.com/DesktopModules/EasyDNNsimpleForum/API/Facebook/ApplicationCallback/ as shown below.
To finalize the setup click on the “Subscribe” options next to “plugin_comment” and “plugin_comment_reply”.
After the previous step is completed, the callback URL is finally set.