code: public static BoxUser getCurrentUser(BoxAPIConnection api) {
          URL url = GET_ME_URL.build(api.getBaseURL());
          BoxAPIRequest request = new BoxAPIRequest(api, url, "GET");
          BoxJSONResponse response = (BoxJSONResponse) request.send();
          JsonObject jsonObject = JsonObject.readFrom(response.getJSON());
          return new BoxUser(api, jsonObject.get("id").asString());
      }
docs: Gets the current user.
  @param  api the API connection of the current user.
  @return     the current user.