@RequestMapping(value = "login", method = RequestMethod.POST)
    public ResponseEntity<String> loginUser(Model model, HttpSession session,@RequestBody User user) {
        try {
            if (session.getAttribute("user") != null)
               return new ResponseEntity<>("the user is already logged in", HttpStatus.BAD_REQUEST);
            user = userService.loginUser(user.getPhone(), user.getPassword());
            session.setAttribute("user", user);
            model.addAttribute("user", user);
            return "MyProfile";
        } catch (UserNotFoundException e) {
            return new ResponseEntity<>(e.getMessage(), HttpStatus.NOT_FOUND);
        } catch (InternalServerException e) {
            return new ResponseEntity<>(e.getMessage(), HttpStatus.INTERNAL_SERVER_ERROR);
        } catch (BadRequestException e) {
            return new ResponseEntity<>(e.getMessage(), HttpStatus.BAD_REQUEST);
        }
    }