The tutorial, authored by Vivek Maskara, provides a comprehensive guide on implementing authentication and authorization in retrieval-augmented generation (RAG) applications using Pinecone and Descope. It emphasizes the importance of access control in securing user-facing web applications, particularly those dealing with sensitive data. The guide explains how to set up a Pinecone project and integrate Descope's authentication and authorization protocols to manage user identities and document relationships, ensuring only authorized users can access specific information. It details the process of creating user-document relationships using Descope's directory service to enable real-time permission management and outlines how to use these relationships to filter query results, thereby enhancing data privacy and integrity. The tutorial includes practical instructions for building a Next.js RAG application, configuring essential components like the Descope SDK, and testing the application's access control features to verify its effectiveness. The complete source code is available on GitHub for users to implement and explore further.