Return 401 for JWT with invalid role

[wolfgangwalther]

A JWT with a role that doesn't exist on the server currently returns a 400 status code. Shouldn't this return a 401 as well, just like all the other JWT errors?

postgrest/test/io/test_io.py

Lines 84 to 88 in 465170c

	headers = jwtauthheader({"role": "not_existing"}, SECRET)
	response = postgrest.session.get("/", headers=headers)
	# TODO: Should this return 401?
	assert response.status_code == 400
	assert response.json()["message"] == 'role "not_existing" does not exist'