Configures a PrometheusScaper object with query credentials
        :param scraper: valid PrometheusScaper object
        :param endpoint: url that will be scraped

def configure_scraper(self, scraper_config):
        """
        Configures a PrometheusScaper object with query credentials
        :param scraper: valid PrometheusScaper object
        :param endpoint: url that will be scraped
        """
        endpoint = scraper_config['prometheus_url']
        scraper_config.update(
            {
                'ssl_ca_cert': self._ssl_verify,
                'ssl_cert': self._ssl_cert,
                'ssl_private_key': self._ssl_private_key,
                'extra_headers': self.headers(endpoint) or {},
            }
        )