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

Description:

PROMO CODE 🚀 The first 50 people to redeem the promo code DOCODEYT will get $20 in free credits! Here's how you can redeem it: Are magic links *actually* secure? 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. This is a critical pattern for any app that needs to verify a user's identity. This is a deep dive into secure automation design. We'll cover the 3-point security model (HTTPS, Ephemeral, Single-Use) that makes URL tokens safe, and show you 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. 👇 WHAT YOU'LL LEARN IN THIS VIDEO 👇 🤔 Are URL Tokens Secure? The 3-point model that makes it safe. 🏗️ Two-Workflow Architecture: Using a main flow (Wait node) and a sub-workflow (Webhook trigger). 🔎 Postgres Token Validation: How to query your database for the incoming token. 🚦 The 3-Part Validation Check: Use an IF node to check: 1. Token exists, 2. Not expired, 3. Not used. 🚫 How to Consume a Token: Update the DB to mark the token as 'used' and prevent replay attacks. ▶️ Resuming a Paused Workflow: Using the Wait node and a dynamic resume URL. 🔒 **CRITICAL:** How to Secure Your Resume Webhook with Header Auth. 🔁 Full End-to-End Demo: A complete test of the entire user click-to-authentication flow. 🔗 Get the full lesson's code from GitHub: ►► New to n8n? Watch our "Getting Started" video first: ►► FULL N8N CRASH COURSE PLAYLIST: 🚀 Join the Developer Cloud (use promo code DOCODEYT for $20 in credits for the first 50 devs who join): // STAY CONNECTED 🌏 Follow our blog for the latest updates: 🦈 Join our Developer Community on Discord: 🐥 Follow us on X/Twitter: 👩‍💻 We're Hiring! See open roles: -------------------- TIMESTAMPS 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