String url = "/welcome.jsp";
                System.out.println("register case");
                String username = getMultiRequest(items, "username");
                String password = getMultiRequest(items, "password");
                String email = getMultiRequest(items, "email");
                String firstName = getMultiRequest(items, "firstName");
                String lastName = getMultiRequest(items, "lastName");
                String profileImg = doFileUpload(items, response);

                User user = new User(username, password, email, firstName, lastName, profileImg);

                if (UserDB.emailExists(user.getEmail()) || UserDB.usernameExists(user.getUsername())) {
                    String message = "This email or username address already exists. <br>";
                    url = "/welcome.jsp";
                } else {
                    String message = "";
                    url = "/homepage.jsp";
                    UserDB.insert(user);
                    session.setAttribute("user", user);
                    request.setAttribute("user", user);
                    request.setAttribute("message", message);
                }
                getServletContext().getRequestDispatcher(url).forward(request, response);
                break;