Spring Cloud authentication with JWT service

    @RequestMapping(value = "/authenticate", method = RequestMethod.POST)
    public ResponseEntity<AuthTokenDTO> authenticate(@Valid @RequestBody AuthenticationDTO authenticationDTO) {
        User user = userManagementService.authenticateUser(
                authenticationDTO.getEmail(), authenticationDTO.getPassword());
        if (user != null) {
            return new ResponseEntity<>(buildAuthenticationTokenFromUser(user), HttpStatus.OK);
        } else {
            return new ResponseEntity<>(HttpStatus.UNAUTHORIZED);
        }
    }