OAuth v2 (Google API) expiry Access Token

Question

I am building an integration component using a graphical framework who has a pre-build OAuth2 connector. This framework required following fields for OAuth v2:

Answer 1

You can use Refresh tokens to make it more long used. The Google Auth server issued Refresh tokens never expire, A token might stop working for one of these reasons: The user has revoked access. The token has not been used for six months. The user changed passwords and the token contains Gmail scopes. The user account has exceeded a certain number of token requests. There is currently a limit of 50 refresh tokens per user account per client.If the limit is reached, creating a new token automatically invalidates the oldest token without warning. This limit does not apply to service accounts.

from: https://developers.google.com/identity/protocols/OAuth2