/**
* Set AWS access key, secret key and token
*
* @return void
*/
public static function setAuthToken()
{
$role_name = file_get_contents('http://169.254.169.254/latest/meta-data/iam/security-credentials/');
$auth = json_decode(file_get_contents('http://169.254.169.254/latest/meta-data/iam/security-credentials/' . $role_name), true);
self::setAuth($auth['AccessKeyId'], $auth['SecretAccessKey']);
self::$__token = $auth['Token'];
}
