How do I retreive user teams from CRM 2011 (OLD on site system)

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jQuery

I have an old on site CRM system (not Dynamics 365) and need to get the users roles.
Here is one of them. All it returns is a list of all the entities, the the user roles.
On on site restBuilder would certainly help.

function UserSecurityRoles() {
 UserID = Xrm.Page.context.getUserId();
   UserID  =UserID .replace("{","").replace("}",""); 

  var fetchXml =
        "<fetch mapping='logical'>" +
            "<entity name='systemuser'>" +
            "<attribute name='systemuserid' />" +
            "<filter type='and'>" +
            "<condition attribute='systemuserid' operator='eq-userid' />" +
            "</filter>" +
            "<link-entity name='systemuserroles' from='systemuserid' to='systemuserid' visible='false' intersect='true'>" +
            "<link-entity name='role' from='roleid' to='roleid' alias='r'>" +
            "<filter type='or'>" +
			"<condition attribute='name' operator='eq' value='Accounts' />";
		" </filter>" +
        "</link-entity>" +
        "</link-entity>" +
        "</entity>" +
        "</fetch>";
    
     var users = ExecuteFetch(fetchXml);
}

function ExecuteFetch (originalFetch) {
    var users;
 
    var fetch = encodeURI(originalFetch);

    var serverURL = Xrm.Page.context.getClientUrl();
    var Query = "?fetchXml=" + fetch;
    var req = new XMLHttpRequest();
    req.open("GET", OdataQuery + Query, false);
    req.setRequestHeader("Accept", "application/json");
    req.setRequestHeader("Content-Type", "application/json; charset=utf-8");
    req.onreadystatechange = function () {
        if (this.readyState == 4 /* complete */) {
            req.onreadystatechange = null;
            if (this.status == 200) {
                 users = JSON.parse(this.responseText).d;
                }
            }
            else {
                var error = JSON.parse(this.response).error;
            }
        }
    };
    req.send();
    return users ;

What I have tried:

I have tried numerous methods and have hit a brick wall.