Authentication Module: Securely handles user authentication and token generation. Queue Management: Utilizes BullMQ and Redis to manage client queues in a FIFO manner. Request Processing: Sequentially processes requests from each client's queue. Concurrency Management: Handles multiple client queues concurrently to optimize performance. Scalability and Robustness: Scales to handle increasing users and requests, with error handling and recovery mechanisms. Logging and Monitoring: Uses Prometheus for logging and monitoring system performance metrics. System Overview: Efficiently manages user requests with a queue structure, ensuring seamless operation and optimal performance. Component Overview: Client Interface: Interacts with the server through API endpoints. Server: Receives requests, manages queues, and processes requests. Database: Stores user data and queue information (MongoDB).