[FeatureReq - API] Add support for identity.getAuthToken()

Is your feature request related to a problem? Please describe.

This is more a feature enhancement than a problem, but the end result is still problematic. My extension allows users to connect to their Google account to save data to Google Sheets. Currently, Edge only supports identity.launchWebAuthFlow(), but the user experience is not good -- users are forced to reconnect their Google account every hour to retrieve a new access token because access tokens expire after an hour.

Is there a solution where the user doesn't have to go through identity.launchWebAuthFlow() every hour to get a new access token?

Describe the solution you'd like

I'd like to see support for identity.getAuthToken() like in Chrome, which handles token refreshes automatically.

If this is not possible, then another solution would be to allow non-interactive flows (interactive: false) because right now identity.launchWebAuthFlow() forces the user to go through the OAuth popup every hour (only interactive: true is accepted).

Describe alternatives you've considered

I couldn't find any reliable solution that would work with extensions.

Additional context

I'm using Edge 126.0.2592.68 (Official build) (64-bit) in Windows 10.