Is there a way to get a pemanent Google credential token on selfhosted n8n?

Questions
1

The Google Credentials tokens expire every 7 days, because the “app” is not Google approved. But there’s no real public app with terms and conditins, logo and so in, I just need to use the API in my n8n and connect n8n to google apis.
It does not matter if the “google app” is in production unaproved or in testing mode, the token expire after 7 days and my aps fail to work if i do not refresh them manualy. Pls help,
It’s very frustrating.

What is the error message (if any)?

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Information on your n8n setup

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2

The 7-day limit is normal for unverified Google OAuth apps. To avoid it, use a Google Service Account, no user consent and no expiry.

Official guide from n8n here: https://docs.n8n.io/integrations/builtin/credentials/google/service-account/

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