I recently moved from the deprecated gapi.auth2 to the new Google Identity Services, using the javascript client library, and noticed a big difference: if someone signs in, and then reloads the page, the session is lost, and has to sign in again, every time the page is loaded. This was not the case with the deprecated library. The problem can be easily reproduced with the Calendar API example.

Is there any configuration option to keep the session persistent? Or do I need to store the access tokens somehow? I could not find anything relevant in the official docs.