SignedWith example

        $configuration = Configuration::forAsymmetricSigner(
            $signer,
            $privateKey,
            $publicKey,
            $encoder,
            $decoder
        );

        // add basic constraint for token signature validation         $constraint = new SignedWith($signer, $publicKey);
        $configuration->setValidationConstraints($constraint);

        return $configuration;
    }
}