Snippet of python code using ASK SDK initializing a Google API service

google_handler.py

from ask_sdk_core.utils import is_intent_name, is_request_type
from ask_sdk_core.dispatch_components import AbstractRequestHandler
from ask_sdk_model.ui import LinkAccountCard
import httplib2
from googleapiclient.discovery import build
from oauth2client.client import AccessTokenCredentials, AccessTokenCredentialsError


class SummaryHandler(AbstractRequestHandler):
    def can_handle(self, handler_input):
        # type: (HandlerInput) -> bool
        return is_request_type("IntentRequest")(handler_input)

    def handle(self, handler_input):
        # type: (HandlerInput) -> Response
        access_token = handler_input.request_envelope.context.system.user.access_token
        if access_token is None:
            handler_input.response_builder.speak("Please log in").set_card(LinkAccountCard())
            return handler_input.response_builder.response

        credentials = AccessTokenCredentials(access_token, 'alexa-skill/1.0')
        http = credentials.authorize(httplib2.Http())
        service = build('drive', 'v3', http=http)

        results = service.files().list(pageSize=500, fields="nextPageToken, files(id, name)").execute()
        items = results.get('files', [])

        handler_input.response_builder.speak("There are {} files in your Google Drive".format(len(items)))
        return handler_input.response_builder.response