Build a secure n8n authentication workflow 🔒 | COMPLETE n8n crash course [Part 9]

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In this video, we build a production‑ready magic‑link authentication workflow in n8n. You’ll learn how to securely pass a token in a URL, validate it against a Postgres database, and use a separate, secured webhook to resume your main workflow—an essential pattern for any app that needs to verify a user’s identity. We cover the 3‑point security model (HTTPS, Ephemeral, Single‑Use) that makes URL tokens safe, and show how to build a two‑workflow system to manage the authentication process. You’ll also learn how to secure your “resume” webhook with header authentication—a pro‑level technique to ensure your main workflow can’t be spoofed. 0:00 - How to Build Secure Magic Links in n8n 0:34 - Are Magic Links in URLs Secure? 1:13 - Create trigger & validate token 2:10 - 3-point validation 3:13 - Consume the token 4:00 - Resume the main workflow 4:18 - CRITICAL: Secure your resume webhook 5:46 - Demo: Authentication test 7:22 - n8n Crash Course: Full Series Recap