https://yennj12.js.org/yennj12_blog_V4/tags/sso/Recent content in SSO on YennJ12 Engineering BlogHugo -- gohugo.ioen-usSun, 30 Nov 2025 13:00:00 +0000https://yennj12.js.org/yennj12_blog_V4/posts/centralized-user-access-control-aws-cognito-cdk/Sun, 30 Nov 2025 13:00:00 +0000https://yennj12.js.org/yennj12_blog_V4/posts/centralized-user-access-control-aws-cognito-cdk/🎯 Introduction Building a centralized user access control system is one of the most critical architectural decisions for modern applications. Whether you’re managing a single application or a microservices ecosystem, having a robust, scalable authentication and authorization system is essential for: Single Source of Truth: One system managing all user identities and permissions Consistency: Uniform authentication experience across all services Security: Centralized security policies and compliance controls Scalability: Support for millions of users across multiple applications Developer Experience: Simple integration for new services Cost Efficiency: Managed service without operational overhead This comprehensive guide demonstrates how to design and implement a production-ready centralized access control system using AWS Cognito and CDK (TypeScript), with strategies for multi-tenancy, role-based access control (RBAC), and integration patterns for various services.