# Page Not Found

The URL `2023.1/appendix/query-engine/query-engine-authentication` does not exist.

You might be looking for one of these pages:
- [Authentication](https://documentation.immuta.com/saas/developer-guides/api-intro/authentication.md)
- [Registering a Connection](https://documentation.immuta.com/saas/configuration/integrations/data-and-integrations/registering-a-connection.md)
- [Deregister a Connection](https://documentation.immuta.com/saas/developer-guides/api-intro/connections-api/how-to-guides/deregister-a-connection.md)
- [Notification Types](https://documentation.immuta.com/saas/request/notifications/reference-guides/notifications-reference-guide/notifications.md)
- [Manage Email Notifications](https://documentation.immuta.com/saas/request/notifications/how-to-guides/manage-email-notifications.md)

## How to find the correct page

1. **Browse the full index**: [/sitemap.md](https://documentation.immuta.com/saas/sitemap.md) - Complete documentation index
2. **View the full content**: [/llms-full.txt](https://documentation.immuta.com/saas/llms-full.txt) - Full content export

## Tips for requesting documentation

- For markdown responses, append `.md` to URLs (e.g., `/saas/developer-guides/api-intro/authentication.md`)
- Use `Accept: text/markdown` header for content negotiation