resolve SECURE_FETCH bugs

ERROR HANDLING FIXES

- use raise_for_status() to pass through response code
- handle exceptions where no response object is passed through

INSTANCE ACTOR

- models.User.objects.create_user function cannot take an ID
- allow instance admins to determine username and email for instance actor in settings.py

bookwyrm/connectors/abstract_connector.py

@@ -244,7 +244,7 @@ def get_data(url, params=None, timeout=settings.QUERY_TIMEOUT):
         raise ConnectorException(err)
 
     if not resp.ok:
-        raise ConnectorException()
+        resp.raise_for_status()
     try:
         data = resp.json()
     except ValueError as err: