I recommend installing the free demo version before obtaining and check the necessity for session management. The OC Session Manager module is mainly intended for OpenCart 3. Opencart stores some user info (language, currency, cart, and many others.) in PHP classes. OpenCart can store this details in two techniques: From https://codytqvqj.blogdanica.com/31764184/little-known-facts-about-yookassa-opencart