public function __construct()
 {
     $connString = "localhost";
     $dbname = "alumnitracker";
     $user = "******";
     $pass = "******";
     try {
         echo "Database construct";
         parent::_construct("mysql:host={$connString};dbname={$dbname},{$user}, {$pass}");
     } catch (Exception $ex) {
         echo $ex->getMessage();
     }
 }