cleanup sqlite variables

Author: Alexandra Shubenko

server/classes/headstart/persistence/PostgresPersistence.php

@@ -3,9 +3,12 @@
 namespace headstart\persistence;
 use headstart\library\APIClient;
 
+require_once 'Persistence.php';
+
 /**
  * This class implements the PersistenceInterface and provides methods to interact with the database.
  */
+
 class PostgresPersistence implements Persistence
 {
 
@@ -99,4 +102,4 @@ public function createID($string_array, $payload): string
 
         throw new \Exception("Could not create ID, response code was : " . $res["httpcode"]);
     }
-}
+}