This tutorial guides users through building a secure, scalable document access control system using WorkOS FGA, AWS Lambda Authorizers, and Amazon S3. The architecture separates concerns, allowing S3 to handle storage and WorkOS FGA to manage access logic. Key components include: Amazon S3 for secure document storage; WorkOS FGA for relationship-based authorization, enabling inheritance and team-based permissions; and AWS Lambda Authorizers for enforcing these permissions dynamically based on user tokens and access policies. The system supports fine-grained permissions at both user and team levels, scales efficiently with an organization, and minimizes operational overhead through serverless components.