How to install plugins on Google Cloud hosted grafana

I installed grafana on GCP VM using https://console.cloud.google.com/marketplace/details/click-to-deploy-images/grafana?filter=category:monitoring&id=7f529a97-13af-4bcd-8050-3c5a63369d33&authuser

But I can’t find how to add any plugins to it.

Could you help me with that? ssh don’t recognize grafana-cli and I can’t access /var/lib/grafana/plugins (not sure if this is the right folder).