Tutorial how to set up Scan'n play Volumio

Hello friends, I saw on the forum that you can use the Scan’n play Volumio application to play a playlist. Now I’m interested if someone has done this, to describe in detail how to insert the playlist into the qr code so that the program reads it and plays it. I’ve been looking at the manual on their site and can’t seem to get it to work. I would like a detailed step-by-step guide.