Not Able to Buy: AttributeError: 'NoneType' object has no attribute 'encode'

[rtaibah]

Getting the following error:

preparing to buy 0.001996 BTC with USDT at 50112.05000000
Traceback (most recent call last):
  File "/Users/rami/scripts/Binance-News-Sentiment-Bot/news-analysis.py", line 489, in <module>
    buy(compiled_sentiment, headlines_analysed)
  File "/Users/rami/scripts/Binance-News-Sentiment-Bot/news-analysis.py", line 389, in buy
    test_order = client.create_test_order(symbol=coin+PAIRING, side='BUY', type='MARKET', quantity=volume[coin+PAIRING])
  File "/usr/local/lib/python3.9/site-packages/binance/client.py", line 1723, in create_test_order
    return self._post('order/test', True, data=params)
  File "/usr/local/lib/python3.9/site-packages/binance/client.py", line 323, in _post
    return self._request_api('post', path, signed, version, **kwargs)
  File "/usr/local/lib/python3.9/site-packages/binance/client.py", line 265, in _request_api
    return self._request(method, uri, signed, **kwargs)
  File "/usr/local/lib/python3.9/site-packages/binance/client.py", line 243, in _request
    kwargs['data']['signature'] = self._generate_signature(kwargs['data'])
  File "/usr/local/lib/python3.9/site-packages/binance/client.py", line 198, in _generate_signature
    m = hmac.new(self.API_SECRET.encode('utf-8'), query_string.encode('utf-8'), hashlib.sha256)
AttributeError: 'NoneType' object has no attribute 'encode'```

[rtaibah]

Had to define api_secret without env variables, since I wasn't using those.

api_key="API_KEY"
api_secret="API_SECRET