I have created my google service account using this tutorial https://developers.google.com/analytics/devguides/reporting/core/v4/quickstart/service-py
Now I want to ask for read and analyze permission from a website in order to do some data analytics. How do I do that?
the service account (with an email like quickstart@PROJECT-ID.iam.gserviceaccount.com) must be granted (at least) read permissions in the corresponding Google Analytics settings. Consider checking Analytics permissions docs