code: def _init_group_settings(self):
          
          self._group_type = self.settings.GROUP_TYPE
          if self._group_type is None:
              raise ImproperlyConfigured(
                  "AUTH_LDAP_GROUP_TYPE must be an LDAPGroupType instance."
              )
  
          self._group_search = self.settings.GROUP_SEARCH
          if self._group_search is None:
              raise ImproperlyConfigured(
                  "AUTH_LDAP_GROUP_SEARCH must be an LDAPSearch instance."
              )
docs: Loads the settings we need to deal with groups.
  
          Raises ImproperlyConfigured if anything's not right.