Enable plugin by helm chart

Hi, I am configuring grafana through the helm chart and I would like to install and enable a plugin (ex: zabbix and cloudflare).
Would it be possible to enable the plugin on the helm chart? If possible, how do I configure it?

Grafana Version: 6.6.2
GitHub: https://github.com/helm/charts/tree/master/stable/grafana

Thank you,