6 demo BO, however I could not scroll all the way down to base of the side menu to entry the module. It's because by default the menu won't scroll, so you're able to't view the back links to The underside. There's a free module available to make the menu https://linkedbookmarker.com/story3660026/the-fact-about-prestashop-webservice-api-that-no-one-is-suggesting