When I use
drawingPath = 'https://6genius-ssl.localhost/get-it/558d0382ea81f173930258g2n0.png';
PIO.open({
images:[drawingPath]
});
I see in the network activity this:

Can I make the URL expire after one access thus allowing print.io to be the only way to access the URL for printing. If not what do you advise? Is there a better way to do this?