JHipster限制登录尝试getDetails = null

Question

我想限制登录尝试。因此，我创建了一个事件监听器：

@Component
public class AuthenticationFailureEventListener implements ApplicationListener<AuthenticationFailureBadCredentialsEvent> {

@Autowired
private LoginAttemptService loginAttemptService;

public void onApplicationEvent(AuthenticationFailureBadCredentialsEvent event) {
    WebAuthenticationDetails webAuthenticationDetails = (WebAuthenticationDetails) event.getAuthentication().getDetails();

    loginAttemptService.loginFailed(webAuthenticationDetails.getRemoteAddress());
}

}

每次尝试登录时，都会得到一个空指针异常。

我正在将JHipster与JWT令牌一起使用