public function findByUid($uid, array $querySettings = ['respectSysLanguage' => false]) {
    if ($uid && $uid > 0) {
      // Create a new query.
      $query = $this->createquery();

      // Apply the passed query settings.
      $query = $this->applyQuerySettings($query, $querySettings);

      // Set the query constraints.
      $query->matching($query->equals('uid', $uid));

      // Execute the query and get the first object.
      $result = $query->execute()->getFirst();

      return $result;
    }

    return null;
  }