def _decrypt(self, rj, token):
        """
        Decrypt an encrypted JsonWebToken

        :param rj: :py:class:`cryptojwt.jwe.JWE` instance
        :param token: The encrypted JsonWebToken
        :return:
        """
        if self.iss:
            keys = self.key_jar.get_jwt_decrypt_keys(rj.jwt, aud=self.iss)
        else:
            keys = self.key_jar.get_jwt_decrypt_keys(rj.jwt)
        return rj.decrypt(token, keys=keys)
Decrypt an encrypted JsonWebToken

        :param rj: :py:class:`cryptojwt.jwe.JWE` instance
        :param token: The encrypted JsonWebToken
        :return: