code: public Query queryUsersWithinLocation(float distance, float lattitude,
              float longitude, String ql) {
          Map<String, Object> params = new HashMap<String, Object>();
          params.put("ql",
                  this.makeLocationQL(distance, lattitude, longitude, ql));
          Query q = queryEntitiesRequest(HttpMethod.GET, params, null, organizationId,
                  applicationId, "users");
          return q;
      }
docs: Perform a query of the users collection within the specified distance of
  the specified location and optionally using the provided query command.
  For example: "name contains 'ed'".
  
  @param distance
  @param location
  @param ql
  @return