Return Unauthorized status code for API calls

[devtobi]

Is your feature request related to a problem? Please describe.
Currently the API gateway returns redirect status code 304 when trying to access endpoints without authorization.
This should only happen for entrypoints under /.
For API calls like /api/myendpoint a status code "401 Unauthorized" should be returned.
This indicates an authorization error to the frontend and avoid redirect loops when calling those API endpoints.

Describe the solution you'd like
Change requests to /api/** to return 401 when unauthorized

Describe alternatives you've considered

Additional context