从Azure CLI和门户命令提示符运行打包程序生成时出错

azure arm:从VM元数据服务获取subscriptionID以进行托管身份验证时出错：无效字符“我只需要添加订阅ID并确保资源组位于正确的区域中

{
"variables": {
  "client_id": "",
  "client_secret": "",
  "subscription_id": ""
},
"builders": [{
  "type": "azure-arm",

  "client_id": "{{user `client_id`}}",
  "client_secret": "{{user `client_secret`}}",
  "subscription_id": "{{user `subscription_id`}}",

  "os_type": "Linux",
  "image_publisher": "Canonical",
  "image_offer": "UbuntuServer",
  "image_sku": "18.04-LTS",

  "managed_image_resource_group_name": "packer-rg",
  "managed_image_name": "myPackerImage",

  "location": "East US",
  "vm_size": "Standard_A2"
}],
"provisioners": [{
  "inline": [
      "apt-get update",
      "apt-get upgrade -y"
  ],
  "inline_shebang": "/bin/sh -x",
  "type": "shell",
  "execute_command": "chmod +x {{ .Path }}; {{ .Vars }} sudo -E sh '{{ .Path }}'"
}]