'Get the calendar service from the storage file token.'

def get(self):

    import httplib2
    from oauth2client.file import Storage
    from googleapiclient import discovery as google_discovery
    credentials = Storage(self.token_file).get()
    http = credentials.authorize(httplib2.Http())
    service = google_discovery.build('calendar', 'v3', http=http, cache_discovery=False)
    return service
