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pythongoogle-apigoogle-oauthgoogle-api-python-client

Credentials object from google service-account has no attribute `to_json`

In official google python client library docs it is suggested to create credentials using Oauth2 client id:

flow = InstalledAppFlow.from_client_secrets_file(
            'credentials.json', SCOPES)
        creds = flow.run_local_server(port=0)

and save them using to_json:

token.write(creds.to_json())

But if I try to use service-account credentials as suggested in this answer or in the following doc like this:

creds2 = service_account.Credentials.from_service_account_file(
    SERVICE_ACCOUNT_FILE, SCOPES)

The types of creds2 and creds are different, and creds2 (from service_account) does not have to_json function. It does not even have items(), so I can not call json.dumps({k: v for (k, v) in creds.items()}) directly.

How can this type of credentials be saved into json file?

Libs versions:

google-api-python-client==2.84.0
google-auth==2.17.2
Solution

  • Service accounts don't need to store user credentials just let it run authorization when needed the client library will handle everything for you