Describe the bug
When using watchtower in API mode sending any request to v1/update endpoint it will always return status 200 OK.

To Reproduce

1. Setup watchtower in API mode
2. Make a request to http://ip:port/v1/update with missing/invalid Authorization header
3. Look at response code

Expected behavior
The API returns 401 Unauthorized whenever the Authorization header is missing/invalid

Screenshots

Environment
Unrelated

"Updates triggered by HTTP API request." only triggered when providing a valid token

Additional context
Would be nice to have meaningful status codes instead of just silently failing