docs: def add_user(bridge_user):
      """
      Add the bridge_user given
      Return a list of BridgeUser objects with custom fields
      """
      resp = post_resource(admin_uid_url(None) +
                           ("?%s" % CUSTOM_FIELD),
                           json.dumps(bridge_user.to_json_post(),
                                      separators=(',', ':')))
      return _process_json_resp_data(resp, no_custom_fields=True)