Enabling Google Auth for Grafana installed using helm chart

I am running Grafana as a Kubernetes pod and I am trying to enable Google Auth for Grafana. I see the documentation for Grafana saying override the environment variables GF_AUTH_GOOGLE_ENABLED, GF_AUTH_GOOGLE_CLIENT_ID and GF_AUTH_GOOGLE_CLIENT_SECRET in the defaults.ini file. But I am not sure how to do a reboot for pods. Kubernetes replaces the container with a new container if I stop it. So can somebody help me on it?