signout out of twitter using Twitter4j

Hi: Is there anyway my SignoutServlet can sign out of Twitter too ?

I am using something like this

    public void doGet(HTTPServletReq req, HTTPServletRes res) throws TwitterException,ServletException
{
   request.getSession(false).invalidate();

}

My question is even when I am invalidating the session, my application doesnt log out of Twitter.

Any clues/ideas of how to log out of Twitter from Twitter4j?

Thanks!

for signout to twitter just delete the credentials. means delete the access token simple.