Vk::getAccessToken

private function getAccessToken($exportId)
{
	if (!isset($this->accessToken[$exportId]))
	{
		$settings = $this->getSettings();

		if (isset($settings[$exportId]["OAUTH"]["ACCESS_TOKEN"]))
			$this->accessToken[$exportId] = $settings[$exportId]["OAUTH"]["ACCESS_TOKEN"];
		else
			throw new ArgumentNullException('accessToken');
	}

	return $this->accessToken[$exportId];
}