Software as a Service (SaaS) has revolutionized the way businesses consume software, offering flexibility, scalability, and cost-effectiveness. Among the various SaaS architectures, multi-tenant SaaS has emerged as a popular model for its ability to serve multiple customers (tenants) from a single instance of the software. However, multi-tenancy introduces unique challenges, particularly in the realm of user authentication and access management. This is where Single Sign-On (SSO) becomes a game-changer, providing a secure and streamlined solution to manage user identities and permissions across multiple tenants.