Get new/refresh access-token and pass it to backend applications

[akasha2z]

I am using OIDC and passing the refresh-token and access-token after initial OIDC login to backend applications for use.
Since this access-token is short-lived, need a way to generate new access-token before it expires and pass it to backend application.

I see there is "OIDCUserInfoRefreshInterval" directive to refresh the access-token before it expires. Looks like this new/refreshed access-token is then stored in the cache, tied to refresh-token.

Can I trigger this refresh of tokens on demand?
And how can I extract the new/refreshed access-token and pass it to backend on demand?

[zandbelt]

see https://github.com/OpenIDC/mod_auth_openidc/wiki/Access-Tokens-and-Refresh-Tokens