Auth0 User Login Flow

• Initiates OAuth 2.0 login flow via webhook.
• Dynamically constructs Auth0 authorization URL.
• Handles the callback with authorization code.
• Exchanges authorization code for an access token.
• Retrieves user profile information from Auth0.
• Includes error handling for missing authorization code.

1. Setup Auth0 Application:

   • Create a Single Page Application on Auth0.
   • Add your n8n instance's callback URLs to Auth0 (e.g., http://localhost:5678/webhook/receive-token). If not running locally, replace localhost with your server address.
   • Retrieve your Auth0 Domain, Client ID, and Client Secret from your application's settings.

2. Configure n8n Workflow:

   • In the Set Application Details node, fill in your Auth0 domain and my_server (your n8n server URL for the callback).
   • In the Set Application Details1 node, fill in your Auth0 domain, client_id, client_secret, and my_server.

3. Initiate Login:

   • Access your n8n instance at https://<your-n8n-server>/webhook/login (replace <your-n8n-server> with your actual server address).
   • This will redirect you to Auth0 for authentication.

4. Callback and Token Exchange:

   • After successful authentication, Auth0 will redirect back to your n8n webhook at /webhook/receive-token with an authorization code.
   • The workflow then uses this code to request an access_token from Auth0.

5. Retrieve Userinfo:

   • With the access_token, the Get Userinfo node fetches the authenticated user's profile details.

Sticky Notes Explanation:

• Sticky Note1, Sticky Note7: Provide essential setup instructions for Auth0 and n8n.
• Sticky Note2: Explains the redirection to Auth0 for user login.
• Sticky Note3: Marks the start of the authentication process.
• Sticky Note4: Indicates the step for retrieving the access token.
• Sticky Note5: Clarifies how the authorization code leads to an access token.
• Sticky Note: Suggests adding &connection=github to the authorize URL for social logins.