ToughWorkz review for Printify: Print on Demand

Connecting to SHOPIFY -- You ask for a URL that does not exist to open up an account. THIS STYLE OF URL does not work Printify Drum roll please - not working - not possible - so your app is a waste of time - my-shop.myshopify.com This URL above is not available? I followed your instructions and it does not exist in my store. What's the issue?