code: public Query queryUsers(String ql) {
          Map<String, Object> params = new HashMap<String, Object>();
          params.put("ql", ql);
          Query q = queryEntitiesRequest(HttpMethod.GET, params, null,organizationId,
                  applicationId, "users");
          return q;
      }
docs: Perform a query of the users collection using the provided query command.
  For example: "name contains 'ed'".
  
  @param ql
  @return