如何使用Python自动登录gmail atom feed？

import os
import google_auth_oauthlib.flow
import google.auth.transport.requests
import google.auth.transport.urllib3
import google_auth_httplib2
from googleapiclient.discovery import build
from googleapiclient.errors import HttpError

# 设置Gmail API凭据
CLIENT_SECRET_FILE = 'client_secret.json'
SCOPES = ['https://www.googleapis.com/auth/gmail.readonly']
API_SERVICE_NAME = 'gmail'
API_VERSION = 'v1'

# 获取Gmail API凭据
def get_credentials():
    creds = None
    if os.path.exists('token.pickle'):
        with open('token.pickle', 'rb') as token:
            creds = pickle.load(token)
    if not creds or not creds.valid:
        if creds and creds.expired and creds.refresh_token:
            creds.refresh(Request())
        else:
            flow = InstalledAppFlow.from_client_secrets_file(CLIENT_SECRET_FILE, SCOPES)
            creds = flow.run_local_server(port=0)
        with open('token.pickle', 'wb') as token:
            pickle.dump(creds, token)
    return creds

# 获取Atom Feed
def get_atom_feed():
    try:
        # 使用Gmail API凭据
        credentials = get_credentials()
        http = credentials.authorize(httplib2.Http())
        service = build(API_SERVICE_NAME, API_VERSION, http=http)

        # 获取Atom Feed
        results = service.users().labels().list(userId='me').execute()
        labels = results.get('labels', [])
        if not labels:
            print('No labels found.')
        else:
            print('Labels:')
            for label in labels:
                print(label['name'])

    except HttpError as error:
        print(f'An error occurred: {error}')

if __name__ == '__main__':
    get_atom_feed()