[Dúvida] ERRO AO RODAR PRINT(DADOS.HEAD())

Bom dia, pessoal. Tudo bem? Sou nova na área de dados, e logo quando rodei o primeiro print para testar a saída da API, eu obtive erro. Segue meu código e erro abaixo:

import os
from os.path import join
import pandas as pd
from datetime import datetime, timedelta

#intervalo de datas
data_inicio = datetime.today()
data_fim = data_inicio + timedelta(days = 7)

#formatando as datas
data_inicio = data_inicio.strftime('%Y-%m-%d')
data_fim = data_fim.strftime('%Y-%m-%d')

city = 'Boston'
key = 'PPV8HWZNZWKHHZ8LREXX3RBC6M'

URL = join('https://weather.visualcrossing.com/VisualCrossingWebServices/rest/services/timeline/',
    f'{city}/{data_inicio},{data_fim}?unitGroup=metric&include=days&key={key}&contentType=csv')

dados = pd.read_csv(URL)
print(dados.head())

erro no terminal:

/bin/python3 /home/anagii/Documents/datapipeline/extrair_dados_clima.py
Traceback (most recent call last):
  File "/home/anagii/Documents/datapipeline/extrair_dados_clima.py", line 20, in <module>
    dados = pd.read_csv(URL)
  File "/home/anagii/.local/lib/python3.8/site-packages/pandas/util/_decorators.py", line 211, in wrapper
    return func(*args, **kwargs)
  File "/home/anagii/.local/lib/python3.8/site-packages/pandas/util/_decorators.py", line 331, in wrapper
    return func(*args, **kwargs)
  File "/home/anagii/.local/lib/python3.8/site-packages/pandas/io/parsers/readers.py", line 950, in read_csv
    return _read(filepath_or_buffer, kwds)
  File "/home/anagii/.local/lib/python3.8/site-packages/pandas/io/parsers/readers.py", line 605, in _read
    parser = TextFileReader(filepath_or_buffer, **kwds)
  File "/home/anagii/.local/lib/python3.8/site-packages/pandas/io/parsers/readers.py", line 1442, in __init__
    self._engine = self._make_engine(f, self.engine)
  File "/home/anagii/.local/lib/python3.8/site-packages/pandas/io/parsers/readers.py", line 1735, in _make_engine
    self.handles = get_handle(
  File "/home/anagii/.local/lib/python3.8/site-packages/pandas/io/common.py", line 713, in get_handle
    ioargs = _get_filepath_or_buffer(
  File "/home/anagii/.local/lib/python3.8/site-packages/pandas/io/common.py", line 363, in _get_filepath_or_buffer
    with urlopen(req_info) as req:
  File "/home/anagii/.local/lib/python3.8/site-packages/pandas/io/common.py", line 265, in urlopen
    return urllib.request.urlopen(*args, **kwargs)
  File "/usr/lib/python3.8/urllib/request.py", line 222, in urlopen
    return opener.open(url, data, timeout)
  File "/usr/lib/python3.8/urllib/request.py", line 531, in open
    response = meth(req, response)
  File "/usr/lib/python3.8/urllib/request.py", line 640, in http_response
    response = self.parent.error(
  File "/usr/lib/python3.8/urllib/request.py", line 569, in error
    return self._call_chain(*args)
  File "/usr/lib/python3.8/urllib/request.py", line 502, in _call_chain
    result = func(*args)
  File "/usr/lib/python3.8/urllib/request.py", line 649, in http_error_default
    raise HTTPError(req.full_url, code, msg, hdrs, fp)
urllib.error.HTTPError: HTTP Error 401:

Poderiam me ajudar, por gentileza?

Agradeço desde já!