protected function build_url( $data, $endpoint ) {
		$url = wc_get_endpoint_url( 'wc-auth/v' . self::VERSION, $endpoint, home_url( '/' ) );

		return add_query_arg(
			array(
				'app_name'     => wc_clean( $data['app_name'] ),
				'user_id'      => wc_clean( $data['user_id'] ),
				'return_url'   => rawurlencode( $this->get_formatted_url( $data['return_url'] ) ),
				'callback_url' => rawurlencode( $this->get_formatted_url( $data['callback_url'] ) ),
				'scope'        => wc_clean( $data['scope'] ),
			), $url
		);
	}