Jira Gadget in Confluence: Authentication for JIRA REST

[Chien-Hao Chen]

Hi, I have a JIRA Gadget using as External Gadget in Confluence, which gadget was implemented with JIRA REST API for retrieving data as following:

...,
args: [
    {key: "restfield",
        ajaxOptions: function() {
            return {
                contentType: 'application/json',
                url: "/rest/api/2/field",
                type: "get"
            };
        }
    },
    {key: "pickersFilters",
        ajaxOptions: function() {
            return {
                contentType: 'application/json',
                url: "/rest/gadget/1.0/pickers/filters?fieldName=quickfind&query=&_=1476427874103",
                type: "get"
            };
        }
    }
]
...

The gadget works well in JIRA Dashboard, but has problem in Confluence because Ajax returns null value: 

{}

I think that the problem is: I'm trying to get those data without authentication of JIRA user.

How to add an authentication box in my gadget for use in Confluence like External Gadget?

Something like this I need:

Sincerely,