Design APIs with secure authentication flows by following proper error handling and documentation practices. Avoid non-null assertions in authorization code, properly document URL format requirements, and provide clear configuration steps for auth providers.
For authentication headers, handle potential null values safely:
// Good: Handle potential null values safely
headers: { Authorization: req.headers.get('Authorization') }
// Bad: Using non-null assertion can lead to runtime errors
headers: { Authorization: req.headers.get('Authorization')! }
For redirect URLs, document format requirements explicitly:
// Important: Redirect URLs must end with a trailing slash
https://example.com/auth/callback/ // Correct
https://example.com/auth/callback // May cause authentication failures
Remember to document all necessary provider configuration steps: “Enable the provider you want to use under Auth Providers in the Supabase Dashboard and add the necessary credentials.”
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