Telegram User Auth with Redis Cache & Google Sheets

This n8n workflow creates a robust user authentication system using Telegram as the interface. A Telegram bot trigger listens for incoming messages, using the chat ID as a unique identifier. It queries a Google Sheets 'Users' sheet to check for existing users. If a user is new, it registers them by appending their details (UserID, Name, Telegram Chat ID). Active sessions are cached in Redis for quick lookups and state management, enabling seamless login handling across workflows.

Key benefits include reduced setup time for Telegram bot apps, scalable user management without a full backend, and high performance via Redis caching. It prevents redundant database calls, supports session persistence, and integrates easily with other n8n workflows for fetching or updating user data.

Ideal use cases: Building Telegram bots for customer support, newsletters, or e-commerce; securing multi-workflow systems; or prototyping auth for SaaS tools. Setup takes 30-45 minutes: configure Telegram bot token, Google Sheets API, and Redis instance, then import and map fields per node notes. Enhances security and efficiency for IT/development projects.