Log in to your PrestaShop as admin.
In the control panel, choose Module manager and then go to Upload module in the upper-right corner. Drag & drop the downloaded module into a popup window.
Make sure that you are connected with the GoodAccess client app.
Navigate to Module manager in the PrestaShop control panel, search for GoodAccess and then click on Configure.
Add your PrestaShop admin (your PrestaShop URL) as a new system in the GoodAccess Web Control Panel and click on Get Plugin Activation Code.
Paste generated Plugin Activation Code into PrestaShop, and click Activate Protection.
You should now see a status PROTECTED.
Congratulations! From now on your PrestaShop admin page will be protected and accessible only by your team connected through the GoodAccess Client App.