This n8n workflow streamlines user data management by automatically detecting new or existing users, storing their information in Google Sheets, and sending personalized Telegram messages. It begins with a trigger that initiates the process, checks if the user is new, and updates the database accordingly. For new users, it records their data and sends a welcome message via Telegram. For returning users, it updates their status and sends a friendly ‘Welcome back’ message. This workflow is particularly useful for automating onboarding, user engagement, and data logging for online services, memberships, or customer support systems.