Invalid API Key provided

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@LukePrior, I'm so excited to try out this thermal printer script that I stumbled on at diyodemag.org. I loved the writeup so much that I subscribed to the magazine! But I am having an issue. I suspect that something may have changed at openweathermap.org with what they permit using the free API. I have a tested valid API but `weather.py` is still returning the following error. Can you confirm?

` File "/home/pi/Raspberry-Pi-Thermal-Printer/code/weather.py", line 38, in
one_call = mgr.one_call(lat=lat, lon=lon)
File "/home/pi/.local/lib/python3.9/site-packages/pyowm/weatherapi25/weather_manager.py", line 531, in one_call
_, json_data = self.http_client.get_json(ONE_CALL_URI, params=params)
File "/home/pi/.local/lib/python3.9/site-packages/pyowm/commons/http_client.py", line 158, in get_json
HttpClient.check_status_code(resp.status_code, resp.text)
File "/home/pi/.local/lib/python3.9/site-packages/pyowm/commons/http_client.py", line 313, in check_status_code
raise exceptions.UnauthorizedError('Invalid API Key provided')
pyowm.commons.exceptions.UnauthorizedError: Invalid API Key provided`

Start with code/weather.py at line 38, where pyowm calls one_call with the configured coordinates, and compare the reported behavior with OpenWeatherMap's current API requirements. Confirm whether the tested key is accepted for this request and identify what must change for the script to run without the UnauthorizedError.

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