@Override
  public ObservableList<PlayerAchievement> getPlayerAchievements(String username) {
    if (userService.getUsername().equals(username)) {
      if (readOnlyPlayerAchievements.isEmpty()) {
        updatePlayerAchievementsFromServer();
      }
      return readOnlyPlayerAchievements;
    }

    int playerId = playerService.getPlayerForUsername(username).getId();
    return FXCollections.observableList(fafApiAccessor.getPlayerAchievements(playerId));
  }
 private void updatePlayerAchievementsFromServer() {
   playerAchievements.setAll(fafApiAccessor.getPlayerAchievements(userService.getUid()));
 }