Namshi\JOSE\JWS::sign PHP Метод

    public function sign($key, $password = null)
    {
        $this->signature = $this->getSigner()->sign($this->generateSigninInput(), $key, $password);
        $this->isSigned = true;
        return $this->signature;
    }

 /**
  * {@inheritdoc}
  */
 public function encode(array $data)
 {
     $jws = new JWS(self::ALGORYTHM);
     $jws->setPayload($data);
     $jws->sign($this->getPrivateKey());
     return $jws->getTokenString();
 }