@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
String login = req.getParameter("login");
String password = req.getParameter("password");
User user = new User(login, password);
if (ContextLoadListener.getUsers().contains(user)) {
HttpSession session = req.getSession();
session.setAttribute("login", user.getLogin());
System.out.println(DispatcherServlet.USER_PAGE);
resp.sendRedirect(DispatcherServlet.USER_PAGE);
} else {
req.setAttribute("wrong_login", true);
req.getRequestDispatcher(DispatcherServlet.HOME_PAGE_JSP).forward(req, resp);