HttpAccessTokenRefreshError at ... unauthorized_client：客户端未经授权使用此方法检索访问令牌

我已经为我的Google日历API项目设置了服务帐户。我们的想法是，我的网站能够连接到我的谷歌日历和展示活动等。因为它是由谷歌HttpAccessTokenRefreshError at ... unauthorized_client：客户端未经授权使用此方法检索访问令牌

Service account clients are created when domain-wide delegation is 
enabled on a service account.

这的确发生了，所以我有一个连接OAuth 2.0 client ID放。到现在为止还挺好。我产生了json文件，我用来连接，并尝试使用此代码

from cal.models import Cal as Caldb 
import httplib2 

from apiclient.discovery import build 
from oauth2client.file import Storage 
from oauth2client.client import OAuth2WebServerFlow 
from oauth2client import tools 

from calendar import monthrange 
from calendar_gui import MyCalendar 
from datetime import datetime 
from datetime import date 
from django.utils.safestring import mark_safe 

from oauth2client.service_account import ServiceAccountCredentials 
import os 
from django.conf import settings 

def authenticate(): 
    scope= ['https://www.googleapis.com/auth/calendar'] 
    credentials = ServiceAccountCredentials.from_json_keyfile_name(os.path.join(settings.PROJECT_ROOT, '../', 'myjson.json'), scopes=scope) 
    delegated_credentials = credentials.create_delegated('[email protected]') 

    http = httplib2.Http() 
    http = delegated_credentials.authorize(http) 
    service = build(serviceName='calendar', version='v3', http=http, credentials=credentials) 

    return service

但可惜

service = build(serviceName='calendar', version='v3', http=http, credentials=credentials) 
File "/usr/local/lib/python2.7/dist-packages/oauth2client/util.py", line 137, in positional_wrapper 
return wrapped(*args, **kwargs) 
File "/usr/local/lib/python2.7/dist-packages/googleapiclient/discovery.py", line 214, in build 
cache) 
File "/usr/local/lib/python2.7/dist-packages/googleapiclient/discovery.py", line 261, in _retrieve_discovery_doc 
resp, content = http.request(actual_url) 
File "/usr/local/lib/python2.7/dist-packages/oauth2client/transport.py", line 153, in new_request 
credentials._refresh(orig_request_method) 
File "/usr/local/lib/python2.7/dist-packages/oauth2client/client.py", line 765, in _refresh 
self._do_refresh_request(http_request) 
File "/usr/local/lib/python2.7/dist-packages/oauth2client/client.py", line 834, in _do_refresh_request 
    raise HttpAccessTokenRefreshError(error_msg, status=resp.status) 
HttpAccessTokenRefreshError: unauthorized_client: Client is unauthorized to retrieve access tokens using this method.

我已经启用了谷歌日历API进行身份验证。事实上，我觉得我已经遵循了所有的步骤。事实上，我已经完成了一次，取得了圆满的成功，但现在我很困惑。我读到，也许我需要等24-48小时才能生效。它可以这么简单吗？

现在，我只是在本地进行测试。没有推送到服务器。

来源

2017-07-09 Matt Cremeens