no need to check if the user is logged in - this is already done in the ocs dispatcher itself

adding @return

lib/private/ocs/privatedata.php

@@ -30,9 +30,9 @@ class OC_OCS_Privatedata {
 	 * test: curl http://login:passwd@oc/core/ocs/v1.php/privatedata/getattribute/testy/123
 	 * test: curl http://login:passwd@oc/core/ocs/v1.php/privatedata/getattribute/testy
 	 * @param array $parameters The OCS parameter
+	 * @return \OC_OCS_Result
 	 */
 	public static function get($parameters) {
-		OC_Util::checkLoggedIn();
 		$user = OC_User::getUser();
 		$app = addslashes(strip_tags($parameters['app']));
 		$key = addslashes(strip_tags($parameters['key']));