code: function (orgIdOrSlug, userId, params) {
        var path;
        if (orgIdOrSlug) {
          path = this.constructPath(constants.ORGANIZATIONS, orgIdOrSlug, constants.USERS, userId);
          return this.Core.GET(path);
        } else {
          return this.rejectRequest('Bad Request: An organization id or slug is required.');
        }
      }
docs: Get an organizations users or a particular user identified by `userId`
  @param  {String|Integer}           orgIdOrSlug A Robin organization id or slug
  @param  {String|Integer|undefined} userId      A Robin user id
  @param  {Object|undefined}         params      A querystring object
  @return {Function}                             A promise