If you migrated customers and if passwords of old accounts do not work - read it. You will find solution for this problem.
This video shows how to protect CMS pages in PrestaShop with password. Module allows to protect any CMS page you want with password. From customer point of view - It will be necessary to provide the proper password to see the CMS page contents.
In this tutorial I will show you new better way to restore PrestaShop back office admin password. Simple and fast method, always works! read it now!