protected function get_url_with_auth( $consumer_key, $consumer_secret ) {

		$auth = new WC_API_Client_Authentication( $this->request->url, $consumer_key, $consumer_secret );

		if ( $auth->is_ssl() ) {

			// query string authentication over SSL works with all servers, whereas HTTP basic auth fails in certain cases
			// see https://github.com/kloon/WooCommerce-REST-API-Client-Library/issues/29
			$this->request->params = array_merge( $this->request->params, array(
				'consumer_key'    => $auth->get_consumer_key(),
				'consumer_secret' => $auth->get_consumer_secret(),
			) );

		} else {

			$this->request->params = array_merge( $this->request->params, $auth->get_oauth_params( $this->request->params, $this->request->method ) );
		}

		// build url
		return $this->request->url . ( ! empty( $this->request->params ) ? '?' . http_build_query( $this->request->params ) : '' );
	}