How to Implement Multi-Tenant Authentication with Keycloak in an Angular Spring Boot Stack | HackerNoon
Briefly

Multi-tenancy in software architecture addresses specific challenges for SaaS applications, particularly concerning authentication management, which is critical for seamless user access and data security.
The implementation of Keycloak with an Angular Springboot stack exemplifies a practical approach to managing multi-tenant authentication, allowing clear differentiation of between internal and external users.
In a functional context, it's vital for an accountancy firm to ensure that both external clients and internal staff can authenticate without compromising data integrity or access privileges.
The separation of databases for internal users and external clients is crucial, as changes to internal staff accounts should have no impact on customer access rights or data.
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