Desktop Air 3.2 AS3 Clear Cookies HTMLLoader

I don´t know how to clear cookies from a HMTLLoader object. My application opens a login third part website and detect if you logged in successfuly. Here is when the third part website creates the cookies, but I have not idea how to clear or delete this cookie when the user log out the tool.

Thanks for your help!

Here is my code:

import flash.html.HTMLLoader; 
import flash.events.Event;  
import flash.net.URLLoader; 
import flash.net.URLRequest; 
import flash.net.URLRequestHeader; 
import flash.net.URLRequestMethod; 
import flash.net.URLVariables;  
 
var myHtml:HTMLLoader = new HTMLLoader(); 
var requests:URLRequest = new URLRequest("login url"); 
myHtml.width = stage.stageWidth; 
myHtml.height = stage.stageHeight; 
myHtml.load(new URLRequest("login url")); 
myHtml.addEventListener(Event.LOCATION_CHANGE, read_request);  

function read_request(evt:Event😞void { 
 var loader = new URLLoader(); 
 configureListeners(loader);  
 requests.method = URLRequestMethod.POST; 
 loader.load(requests);  
}...