错误：凭证＆＃x27;对象无属性＆＃x27;带有_subject＆＃x27;

Question

我正在尝试使用服务帐户使用Google ADS API。
以下工作：

from google.ads.googleads.client import GoogleAdsClient
from google.oauth2.service_account import Credentials as ServiceAccountCreds

oauth2_client = ServiceAccountCreds.from_service_account_file(
    filename=key_file, subject=developer_account,
    scopes=["https://www.googleapis.com/auth/adwords"]
)
google_ads_client = GoogleAdsClient(login_customer_id=self.login_customer_id, credentials=oauth2_client,
                                    developer_token=self.developer_token)

self.ga_service = self.google_ads_client.get_service("GoogleAdsService", version="v9")
self.ga_serice.search_stream(customer_id=self.client_customer_id, query =  query)

我想对身份工作负载联合（w/o密钥）进行关注：

from google.auth import aws as google_auth_aws
from google.ads.googleads.client import GoogleAdsClient

credentials = google_auth_aws.Credentials.from_info(json_config_info)  # from workload identity federation
credentials = credentials.with_scopes(["https://www.googleapis.com/auth/adwords"])
credentials = credentials.with_subject(self.developer_account)
# Build the service object.
self.google_ads_client = GoogleAdsClient(login_customer_id=self.login_customer_id, credentials=credentials,
                                    developer_token=self.developer_token)

self.ga_service = self.google_ads_client.get_service("GoogleAdsService", version="v9")
self.ga_service.search_stream(customer_id =self.client_customer_id, query =  self.query)

这会引发错误： 错误：“凭据”对象没有_subject'。