JSON Decode error on initiation

[HumanBot000]

lingo  = duolingo.Duolingo('User', 'PW')
print(lingo.get_user_info())

results in

 
    lingo  = duolingo.Duolingo('User', 'PW')
  File "frfrfrfrfedevr\duolingo.py", line 66, in __init__
    self._login()
  File "jemff4gfh4rb\duolingo.py", line 105, in _login
    attempt = request.json()
  File "dhb3ufh34fffh403bgf\requests\models.py", line 975, in json
    raise RequestsJSONDecodeError(e.msg, e.doc, e.pos)
requests.exceptions.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

[HumanBot000]

I thinks it's a copy of #128 (comment)