User user = User.getUser(username);
if (user == null) {
req.setAttribute("errorMessage", "User not found");
RequestDispatcher disp = getServletContext().getRequestDispatcher("/login.jsp");
disp.forward(req, resp);
}
// Put the user object in the session object and forward to messageCenter JSP
HttpSession session = req.getSession(true);
session.setAttribute("user", user);
RequestDispatcher disp = getServletContext().getRequestDispatcher("/messageCenter.jsp");
disp.forward(req, resp);