How to automate user/team creation with Helm chart installation

I am using Grafana Helm chart to install Grafana on K8s cluster.
The procedure works quite good, also predefining dashboards, so that they are accessible after installation.
I didn’t find a solution to automate the creation of users & teams so far. How can I specify users and teams , so that they are being created on “helm install”-ing the chart ?
Any hint highly appreciated