Proxy: Fix updating refresh token in OAuth pass-thru (#26885)
Proxy: Fix updating refresh token in OAuth pass-thru (#26885)

* Handle updating refresh token in oauth pass-thru

Co-authored-by: Arve Knudsen <ddb1ca96248d128f0719f3f79aee1e346dace4b9@gmail.com>
grafana/grafana,grafana/grafana,grafana/grafana,grafana/grafana,grafana/grafana,grafana/grafana,grafana/grafana