我正在尝试建立与garmin API的连接并建立至Authentiocation连接，但是出现错误：
requests_oauthlib.oauth1_session.VerifierMissing: No client verifier has been set.
有人可以提供有关如何建立连接的完整示例吗？ 我的代码是：
consumer_key = "************"
consumer_secret = "************"
ACCESS_TOKEN_URL = \
"https://connectapi.garmin.com/oauth-service/oauth/access_token"
AUTHORIZE_TOKEN_URL = "https://connect.garmin.com/oauthConfirm"
REQUEST_TOKEN_URL = \
"https://connectapi.garmin.com/oauth-service/oauth/request_token"
oauth = OAuth1Session(client_key = consumer_key,
client_secret=consumer_secret)
oauth.fetch_request_token(REQUEST_TOKEN_URL)
authorization_url = oauth.authorization_url(AUTHORIZE_TOKEN_URL)
oauth_response = oauth.parse_authorization_response(authorization_url)
verifier = oauth_response.get('oauth_verifier')
oauth.token['oauth_verifier'] = verifier
oauth.fetch_access_token(ACCESS_TOKEN_URL)
错误是：
文件 “ /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/requests_oauthlib/oauth1_session.py”， 319行，在fetch_access_token中 引发VerifierMissing（'未设置客户端验证程序。'）requests_oauthlib.oauth1_session.VerifierMissing：没有客户端验证程序 已设置。