List of Access Keys from Output Values after ARM Template Deployment

ApplicationInsights.json

{
  "variables": {
    "applicationInsights": {
      "name": "my-application-insights"
    },
    "resourceId": "[resourceId('Microsoft.Insights/components', variables('applicationInsights').name)]",
    "apiVersion": "[providers('Microsoft.Insights', 'components').apiVersions[0]]"
  },
  "resources": [],
  "outputs": {
    "instrumentationKey": {
      "type": "string",
      "value": "[reference(variables('resourceId'), variables('apiVersion')).instrumentationKey]"
    }
  }
}