JSON parsing bug

Having a pylogbook client pointing to pylogbook.NamedServer.TEST, activities is set to [].

Not having passed an RBAC token, and calling pylogbook.Client.get_events(from_date=start_date) produces JSON parsing error:

Traceback (most recent call last):
    events_pages = self._client.get_events(from_date=start_date)
  File "/opt/acc-py/2020.11/lib/python3.7/site-packages/pylogbook/_client.py", line 193, in get_events
    events = PaginatedEvents(resp.json()['answerAsCount'], query)
  File "/opt/acc-py/2020.11/lib/python3.7/site-packages/requests/models.py", line 900, in json
    return complexjson.loads(self.text, **kwargs)
  File "/acc/local/share/python/acc-py/base/2020.11/lib/python3.7/json/__init__.py", line 348, in loads
    return _default_decoder.decode(s)
  File "/acc/local/share/python/acc-py/base/2020.11/lib/python3.7/json/decoder.py", line 337, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/acc/local/share/python/acc-py/base/2020.11/lib/python3.7/json/decoder.py", line 355, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

pylogbook v3.1.0

Expectations:

• If the issue is with Authentication, LogbookError should be produced.
• If the issue is with empty activities, JSON parsing should be able to handle it or another LogbookError produced stating the invalid request.