List of Access Keys from Output Values after ARM Template Deployment

StorageAccounts.json

{
  "variables": {
    "storageAccount": {
      "name": "my-storage-account"
    },
    "resourceId": "[resourceId('Microsoft.Storage/storageAccounts', variables('storageAccount').name)]",
    "apiVersion": "[providers('Microsoft.Storage', 'storageAccounts').apiVersions[0]]"
  },
  "resources": [],
  "outputs": {
    "storageAccountKey": {
      "type": "string",
      "value": "[listKeys(variables('resourceId'), variables('apiVersion')).keys[0].value]"
    },
    "storageAccountEndpoint": {
      "type": "string",
      "value": "[concat('DefaultEndpointsProtocol=https;AccountName=', variables('storageAccount').name, ';AccountKey=', listKeys(variables('resourceId'), variables('apiVersion')).keys[0].value, ';EndpointSuffix=core.windows.net')]"
    }
  }
}