Installing grafana on cluster using helm chart through fluxcd

Hi guys,
I have to install grafana on my k8s cluster using helm chart. My helm charts are saved in git repository so i need to follow gitops approach. I use Fluxcd.
So for installing helm charts i need to create a file where i’ll have to pass values that are required for the chart.

For setting up grafana cloud i’ll have to pass access policy token. But as i’ll push this file to github. My access policy token can be exposed to others. So how can i install grafana in my scenario?