params.add( client ); return execute( "doLogin", params );
Document user = execute( "doLogin", params ); HttpSession session = request.getSession();  if( user != null ) { session.setAttribute("user", user ); }  return user;
    public Document doLogin( String login, String password, String client) throws XmlRpcException, IOException, DocumentException    {        Vector params = new Vector(3);        params.add( login );        params.add( password );        params.add( client );        return execute( "doLogin", params );    }