docs: public static BufferedImage showqrcode(String ticket){
  		HttpUriRequest httpUriRequest = RequestBuilder.get()
  				.setUri(MP_URI + "/cgi-bin/showqrcode")
  				.addParameter("ticket", ticket)
  				.build();
  		CloseableHttpResponse httpResponse = LocalHttpClient.execute(httpUriRequest);
  		return getImage(httpResponse);
  	}