I recommend installing the free demo version right before acquiring and check the need for session management. The OC Session Manager module is mainly meant for OpenCart 3. Opencart stores some user facts (language, currency, cart, etcetera.) in PHP periods. OpenCart can store this data in two ways: From the https://spencerpmlbv.boyblogguide.com/31066289/create-your-own-ecommerce-with-opencart-an-overview