public function getPrincipal($markerSiteId)
{
$user = Session::get(user);
$auth = Authorization::whereRaw('token = ? and atlas_id = ? and privileges = \'ALL\'', array($user->uid, $markerSiteId))->first();
if ($user->role == 'ADMIN' && $auth == NULL) {
$auth = Authorization::create(array('token' => $user->uid, 'principal' => 'admin:' . $user->uid, 'privileges' => 'ADMIN'));
}
Log::debug("Privileges: " . $auth->principal . "/" . $auth->privileges);
return $auth->principal;
}