else if (comm.equals("delete")) {
url = "/usuarios/jsp/welcome.jsp";
Manager m = Manager.getInstace();
String username = request.getParameter("username");
msg = m.deleteUser(username, user.getUsername());
if (username.equals(user.getUsername())) {
url = "/usuarios/jsp/login.jsp";
request.getSession().removeAttribute("usuario");
}
request.setAttribute("msg", msg);