I'm trying to provision a GitHub data source from a config file, using environment variables to substitute in the secret values. The issue I'm hitting is that the App and Installation IDs are numeric strings and I can't get the config to interpret them as strings.

The exact error I'm getting is:

json: cannot unmarshal number into Go struct field Settings.appId of type string

My config file looks like this:

apiVersion: 1
datasources:
  - name: GitHub
    type: grafana-github-datasource
    jsonData:
      selectedAuthType: github-app
      appId: $GITHUB_APP_ID
      installationId: $GITHUB_INSTALLATION_ID
    secureJsonData:
      privateKey: $GITHUB_PRIVATE_KEY

And my environment variables look like:

GITHUB_APP_ID=1111111
GITHUB_INSTALLATION_ID=11111111

I've also tried wrapping the variable in quotes but this causes a parse error, and I've tried wrapping the config value in quotes but that didn't seem to make a difference.