public function getCredentials(Request $request)
    {
        $tokenExtractor = $this->getTokenExtractor();

        if (!$tokenExtractor instanceof TokenExtractorInterface) {
            throw new \RuntimeException(sprintf('Method "%s::getTokenExtractor()" must return an instance of "%s".', __CLASS__, TokenExtractorInterface::class));
        }

        if (false === ($jsonWebToken = $tokenExtractor->extract($request))) {
            return;
        }

        $preAuthToken = new PreAuthenticationJWTUserToken($jsonWebToken);

        try {
            if (!$payload = $this->jwtManager->decode($preAuthToken)) {
                throw new InvalidTokenException('Invalid JWT Token');
            }

            $preAuthToken->setPayload($payload);
        } catch (JWTDecodeFailureException $e) {
            if (JWTDecodeFailureException::EXPIRED_TOKEN === $e->getReason()) {
                throw new ExpiredTokenException();
            }

            throw new InvalidTokenException('Invalid JWT Token', 0, $e);
        }

        return $preAuthToken;
    }