Auth0 OAuth 2.0 Login and Session Management

This workflow automates user authentication using Auth0's OAuth 2.0 flow, handling login, callback, token exchange, user profile retrieval, session management, and logout. It processes requests via secure webhooks, validates Auth0 configuration, constructs authorization URLs, exchanges codes for tokens, and manages user sessions. Key nodes include Webhook for login/logout/callback, IF for validation, HTTP Request for token exchange and user info, and Set for session management. Ideal for web applications or platforms (1-100 users) requiring secure user authentication, reducing setup time from hours to minutes per integration.\n\nROI saves 5-10 hours per integration for developers building secure login systems, ensuring robust authentication with minimal effort. Use cases include securing web apps, APIs, or internal tools with single sign-on (SSO). Requirements: Auth0 account (free tier or ~$23/month), n8n instance (free or cloud.n8n.io, ~$20/month), AUTH0_DOMAIN, AUTH0_CLIENT_ID, AUTH0_CLIENT_SECRET, N8N_SERVER_URL, SESSION_SECRET env vars. Scalability supports thousands of daily authentications; limited by Auth0 rate limits (~1,000 requests/hour, free tier) and n8n webhook capacity.\n\nInstall n8n from n8n.io or cloud.n8n.io. Obtain Auth0 credentials (domain, client ID, client secret) from auth0.com dashboard. Set env vars. Configure n8n credentials: HTTP Header Auth (optional for webhook security). Node setup: Webhook (GET, paths: 'auth/login', 'auth/callback', 'auth/logout'), HTTP Request (Auth0 token and userinfo endpoints), Set (dynamic auth_url, session data). Expose webhooks via ngrok or public URL.\n\nTest with GET request to /auth/login (e.g., http://localhost:5678/webhook/auth/login); verify redirect to Auth0 login, callback handling, and session data in response. Common errors: Missing env vars (500—check Auth0 credentials), invalid callback code (401—verify redirect URI in Auth0), rate limits (429—implement retries). Deploy by activating workflow, sharing webhook URLs. Maintenance: Monitor Auth0 quotas, rotate client secrets quarterly, validate redirect URIs. Optimize: Cache userinfo responses, adjust session expiry, refine scopes (e.g., add 'offline_access' for refresh tokens).", "businessValue": "Saves 5-10 hours per integration automating secure Auth0 OAuth flows for web apps or APIs", "setupTime": "15-25 minutes", "difficulty": "Intermediate", "requirements": ["Auth0 account", "AUTH0_DOMAIN, AUTH0_CLIENT_ID, AUTH0_CLIENT_SECRET, N8N_SERVER_URL, SESSION_SECRET env vars", "n8n installation, API integration knowledge"], "useCase": "Automating secure user authentication and session management for web applications or APIs"