protected void doMessage(SipServletRequest request) throws
    ServletException, IOException {
        String sender = getSIPuri(request.getHeader("From"));
        String message = request.getContent().toString();
        String newAor= getSIPuri(message);
        boolean senderConditions= sender.contains("gestor") && !newAor.equals(null);
        System.out.println("MENSAGEMMMMMMM "+ message+" "+Colaborator.contains(newAor) + " "+getString("sip", "@", newAor).contains("colaborador")+" "+Binding.containsKey(newAor) + " "+ newAor );
        if(senderConditions){
            if(message.contains("ADD") && !Colaborator.contains(newAor) && getString("sip", "@", newAor).contains("colaborador")  && Binding.containsKey(newAor)){
                Colaborator.add(newAor);

                send(200,request);
                System.out.println("ADDED "+ Colaborator.get(Colaborator.size()-1));
            }else{
                if (message.contains("REMOVE") && Colaborator.contains( newAor)){
                    Colaborator.remove(newAor);
                    System.out.println("REMOVED");
                    send(200,request);
                } else{
                    send(403,request);}
            }
        }else
            send(401,request);
    }