Set Token expire period for 6 months.

[nobo73]

Describe the feature you'd like to request

Hi, this plugin is great, but Google Oauth2 will expire in a week.
I will get following message every week.

Google OAuth error : Client error: POST https://oauth2.googleapis.com/token` resulted in a 400 Bad Request response: { "error": "invalid_grant", "error_description": "Token has been expired or revoked." }`

Every time this token revokes, I need to re-authorize this again.

Describe the solution you'd like

I would like to set this re-vilidation period as long as possible.
Here, I found the token expireation document.
https://developers.google.com/identity/protocols/oauth2?hl=en#expiration

Is it possible that the user can set token re-validation period?

Thanks,

Describe alternatives you've considered

At this moment, I re-validate the token every week.
It is okay to have auto-revalidation function, so that I don't need to do this work every week.

Thanks,

[MarcelRobitaille]

@nobo73 Could you please try this on version 4.0.0