List of Access Keys from Output Values after ARM Template Deployment

ServiceBus.json

{
  "variables": {
    "serviceBus": {
      "name": "my-service-bus",
      "sasKeyName": "RootManageSharedAccessKey"
    },
    "resourceId1": "[resourceId('Microsoft.ServiceBus/namespaces', variables('serviceBus').name)]",
    "resourceId2": "[resourceId('Microsoft.ServiceBus/namespaces/authorizationRules', variables('serviceBus').name, variables('serviceBus').sasKeyName)]",
    "apiVersion": "[providers('Microsoft.ServiceBus', 'namespaces').apiVersions[0]]"
  },
  "resources": [],
  "outputs": {
    "serviceBusEndpoint": {
      "type": "string",
      "value": "[reference(variables('resourceId1'), variables('apiVersion')).serviceBusEndpoint]"
    },
    "serviceBusSasKey": {
      "type": "string",
      "value": "[listKeys(variables('resourceId2'), variables('apiVersion')).primaryKey]"
    },
    "serviceBusConnectionString": {
      "type": "string",
      "value": "[listKeys(variables('resourceId2'), variables('apiVersion')).primaryConnectionString]"
    }
  }
}