Calling Jira REST API using Javascript to get user permissions and groups

Useful simple code in Javascript to get the username and groups of the current user in Jira using the public REST API.

(function() {

function getCurrentUserData()
{
var user;
     AJS.$.ajax({
        url: "/rest/api/2/myself",
        type: 'get',
        dataType: 'json',
        async: false,
        success: function(data) {
            user = data.key;
        }
     });
     return user;
}



function getCurrentUserGroups()
{
var user;
     AJS.$.ajax({
        url: "/rest/api/2/myself?expand=groups",
        type: 'get',
        dataType: 'json',
        async: false,
        success: function(data) {
            group = data.groups.items[0].name;
        }
     });
     return group;
}


alert("User:" + getCurrentUserData()+ " Group:"+ getCurrentUserGroups());


})();