当我通过postman登录到我的API时，会生成一个JWT，使用这个JWT为特定用户创建数据，但是当我与这个用户及其JWT连接时，当我使用连接用户的JWT从Postman发出GET请求时，我得到一个400错误，说请求是坏的。我不明白为什么。我的Tomcat服务器端口不是8080而是7777...只是用GET方法在我的控制器下面：

@CrossOrigin(origins = "*")
        @RestController
        @RequestMapping("/weights")
        public class WeightRecordController {
            @Autowired
            AppUserRepository appUserRepository;
            @Autowired
            PersonRepository personRepository;
            private final Logger logger = LoggerFactory.getLogger(WeightRecordController.class);
            public Long getAppUserConnectedId(Principal principal) {
                if (!(principal instanceof UsernamePasswordAuthenticationToken)) {
                    throw new RuntimeException(("User not found"));
                }
                logger.info("USER IS PRESENT IN DATABASE FROM FUNCTION 'getAppUserConnectedId()'");
                UsernamePasswordAuthenticationToken token = (UsernamePasswordAuthenticationToken) principal;
                AppUser appUserFinded = appUserRepository.findByAppUsername(token.getName());
                return appUserFinded.getIdUser();
            }
            @GetMapping("/all")
            public ResponseEntity<List<WeightRecord>> getAllWeights(@RequestParam Principal principal) {
                logger.info("GET /weights/all");
                Long appUserConnectedId = this.getAppUserConnectedId(principal);
                Person personToShow = personRepository.findById(appUserConnectedId).orElseThrow();
                return new ResponseEntity<List<WeightRecord>>(personToShow.getWeightsList(), HttpStatus.OK);
            }
    }