US_proxy connection error

`from finnlp.data_sources.news.finnhub_date_range import Finnhub_Date_Range

start_date = "2023-01-01"
end_date = "2023-01-02"
config = {
"use_proxy": "us_free", # use proxies to prvent ip blocking
"max_retry": 5,
"proxy_pages": 5,
"token": "ck22t49r01qng12gonugck22t49r01qng12gonv0" # Available at https://finnhub.io/dashboard
}

news_downloader = Finnhub_Date_Range(config) # init
news_downloader.download_date_range_stock(start_date,end_date) # Download headers
news_downloader.gather_content() # Download contents
df = news_downloader.dataframe
selected_columns = ["headline", "content"]
print(df[selected_columns].head(10))
`

Getting the us proxy will incur a connection error.
`requests.exceptions.ConnectionError: ('Connection aborted.', ConnectionResetError(104, 'Connection reset by peer'))`

When the function `get_us_free_proxy`, at the line `response = requests.get(url, headers=headers)`