Check httpx raise_for_status calls

[olevski]

The raise_for_status call from httpx is called several times in our code. It fails when the status is anything not equal to 2xx.

And we do not handle these exceptions in our centralized exception handler. So that means that these calls result in 500 status codes for the API. But perhaps some of them should be 404s or 401s. So it would be good to change these.

Also if we want to keep using this is may be a good idea to add a handler for this exception in the centralized error handler.