code: @SuppressWarnings("unchecked")
      @Override
  	public <T> T by(int userId) {
  	    User sfsUser = api.getUserById(userId);
  	    if(sfsUser != null)
  	        return (T)sfsUser.getProperty(APIKey.USER);
  	    return null;
  	}
docs: /* (non-Javadoc)
  @see com.tvd12.ezyfox.core.command.GetUser#by(int)