As internet usage surges, businesses increasingly rely on user management systems to retain customers and gather data, yet managing multiple services can be cumbersome without the right tools. Single sign-on (SSO) solutions, such as FusionAuth, offer a streamlined authentication process by allowing users to access various applications with a single set of credentials, thus enhancing user experience and reducing security risks. FusionAuth, an identity provider, supports integration with platforms like Shopify, offering comprehensive features like OAuth, OpenID Connect, and SAML, along with compliance with data protection laws. This tutorial demonstrates how to integrate SSO into a Shopify store using FusionAuth, allowing customers to have a cohesive login experience across services, from the store to forums or customer support systems. The integration process includes installing and configuring necessary apps, setting up the FusionAuth instance, and testing the setup to ensure seamless operation, ultimately improving user experience and simplifying user management.