getCreateTimestamp function added for LDAP

		$this->closeLDAPConnection($conn);

	}

	/**

	 * Method getCreateTimestamp

	 *

	 * @param string $username [explicite description]

	 *

	 * @return string

	 */

	public function getCreateTimestamp(string $username): ?string

	{

		try {

			$conn = $this->getLDAPConnection();

			$baseDn = implode(',', $this->getLDAPBaseUsers());

			$filter = sprintf('(username=%s)', ldap_escape($username, '', LDAP_ESCAPE_FILTER));

			$attributes = ['createTimestamp'];

			$search = ldap_search($conn, $baseDn, $filter, $attributes);

			if (!$search) {

				throw new Exception("LDAP search failed for user: $username");

			}

			$entries = ldap_get_entries($conn, $search);

			$this->closeLDAPConnection($conn);

			if ($entries['count'] === 0 || empty($entries[0]['createtimestamp'][0])) {

				return null;

			}

			// Format: 20220817084557Z -> 2022-08-17 08:45:57

			$raw = $entries[0]['createtimestamp'][0];

			$date = \DateTime::createFromFormat('YmdHis\Z', $raw);

			return $date ? $date->format('Y-m-d H:i:s') : null;

		} catch (Exception $e) {

			// Log or handle error as needed

			return null;

		}

	}

}