docs: def sync_users(self):
          """Synchronize LDAP users with local user model."""
          if self.settings.USER_FILTER:
              user_attributes = self.settings.USER_ATTRIBUTES.keys() + self.settings.USER_EXTRA_ATTRIBUTES
              ldap_users = self.ldap.search(self.settings.USER_FILTER, user_attributes)
              self._sync_ldap_users(ldap_users)
              logger.info("Users are synchronized")