@Override
  protected void doPost(HttpServletRequest req, HttpServletResponse resp)
      throws ServletException, IOException {
    HttpSession session = req.getSession();
    String exitParam = req.getParameter("exit");
    String deleteParam = req.getParameter("delete");
    String settingsParam = req.getParameter("settings");

    if ("settings".equals(settingsParam)) {
      resp.sendRedirect("/profileSettings");
      return;
    }

    if ("exit".equals(exitParam)) {
      // обнуляем куку
      Cookie[] cookies = req.getCookies();
      if (cookies != null) {
        for (Cookie cookie : cookies) {
          if (cookie.getName().equals("remember")) {
            cookie.setMaxAge(0);
            cookie.setValue(null);
            resp.addCookie(cookie);
            break;
          }
        }
      }
      session.setAttribute("user_a", null);
      resp.sendRedirect("/login");
    }

    if ("delete".equals(deleteParam)) {
      // обнуляем куку
      Cookie[] cookies = req.getCookies();
      if (cookies != null) {
        for (Cookie cookie : cookies) {
          if (cookie.getName().equals("remember")) {
            cookie.setMaxAge(0);
            cookie.setValue(null);
            resp.addCookie(cookie);
            break;
          }
        }
      }
      try {
        UserRepository.deleteUser((User) session.getAttribute("user_a"));
      } catch (SQLException e) {
        req.setAttribute("message", "Some problems with server");
        resp.sendRedirect("/profile");

        e.printStackTrace();
      }
      session.setAttribute("user_a", null);
      resp.sendRedirect("/welcome");
    }
  }