尝试使用 Slack API（实时消息传递）时，我收到了似乎是认证错误的信息。
任何想法为什么会发生这种情况？很想得到一些反馈，为我指明正确的方向。我使用的是 python 2.7，代码托管在 pythonanywhere 的付费帐户中。
import os
from slackclient import SlackClient
verif_token = os.environ.get("MYTOKEN")
slack_client = SlackClient(verif_token)
slack_client.rtm_connect(with_team_state=False)
Traceback (most recent call last):
File "/home/xyz/.local/lib/python2.7/site-packages/slackclient/client.py", line 52, in rtm_connect
self.server.rtm_connect(use_rtm_start=with_team_state, **kwargs)
File "/home/xyz/.local/lib/python2.7/site-packages/slackclient/server.py", line 147, in rtm_connect
self.connect_slack_websocket(self.ws_url)
File "/home/xyz/.local/lib/python2.7/site-packages/slackclient/server.py", line 186, in connect_slack_websocket
raise SlackConnectionError(message=str(e))
SlackConnectionError: _ssl.c:335: No root certificates specified for verification of other-side certificates.