docs: public void getStreamsByKeyword(String keyword, int pageNumber, int itemsPerPage, final KickflipCallback cb) {
          if (!assertActiveUserAvailable(cb)) return;
          GenericData data = new GenericData();
          addPaginationData(pageNumber, itemsPerPage, data);
          data.put("uuid", getActiveUser().getUUID());
          if (keyword != null) {
              data.put("keyword", keyword);
          }
          post(SEARCH_KEYWORD, new UrlEncodedContent(data), StreamList.class, cb);
      }