Sami B2B Lock,Password Protect

I needed to restrict access to one page on my site and couldnt warrant paying a monthly fee for a very basic feature that Shopify could have included as standard. After several failed attempts to find a coding workaround that worked, I found Sami. It worked perfectly. Dead easy to setup and a choice of different login versions to choose from. It would be nice if you could customise the look of the login screen a bit more by yourself, but they can change the look for you if you contact support. They did however remove the advertising watermark within 30 minutes of asking. Pretty good of them considering its a free app.