What You'll Need n8n Cloud or self-hosted n8n instance Hetzner VPS or Contabo VPS for self-hosting A code editor (VS Code recommended) OAuth2-enabled service account (Google, GitHub, or Spotify) Basic understanding of HTTP requests and JSON Table of Contents Understanding OAuth2 Flow Setting Up Your First OAuth2 Application Implementing OAuth2 in n8n Common OAuth2 Patterns and Troubleshooting Getting Started Understanding OAuth2 Flow I remember the first time I tried to integrate with an API that required OAuth2. I expected a simple username and password, and instead got hit with authorization codes, token endpoints, and refresh tokens. It felt like overkill until I realized: OAuth2 isn't designed for your app to hoard user credentials—it's designed so you never touch them.…