public function __construct(SiteAccess $siteAccess, $username, Exception $previous = null)
 {
     parent::__construct("User '{$username}' doesn't have user/login permission to SiteAccess '{$siteAccess->name}'", $previous);
 }
 /**
  *
  */
 public function __construct()
 {
     parent::__construct("Missing user privilege");
 }