@Override
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("html");
DaoUser dao = new DaoUser();
User user = dao.login(request.getParameter("mail"), request.getParameter("password"));
if(user != null) {
request.getSession().setAttribute("user", user);
}
else {
response.setStatus(599);