Supabase Auth provides common authentication functionality out of the box.
But applications sometimes need additional logic.
For example:
New user
↓
Authentication
↓
Custom logic
↓
Application profile
This is where Auth Hooks can become useful.
What Are Auth Hooks?
Hooks allow developers to run custom logic at specific authentication events.
Depending on the workflow, custom logic can help integrate authentication with application-specific requirements.
Creating Application Profiles
A common example is creating application-specific user information.
The authentication system manages identity.
Your application's profile table can store business information such as:
display_name
company
timezone
avatar
Custom Workflows
Hooks can also be useful when authentication needs to interact with another part of the application.
For example:
User signs up
↓
Auth event
↓
Application workflow
↓
Profile / organization setup
Keep Hooks Small
Authentication runs on a critical path.
Avoid putting unnecessarily heavy operations into authentication workflows.
Long-running operations can make login and signup slower.
Test Carefully
Test:
- New signup
- Existing users
- Failed authentication
- OAuth
- Email confirmation
- Error handling
Final Thoughts
Auth Hooks are useful when the standard authentication flow needs application-specific behavior.
Use them for focused logic rather than turning authentication into a large collection of business processes.