Importing Credentials using json import

Hi,

I am trying to use a json file to import a bunch of server details. They import fine but I can't seem to get the credentials to import. I have tried everything - username and password fields, setting it to inherit from the parent, setting it to get it from my personal credentials. Here's an example of some of the things I've tried in my import.json file:

{
  "Connections": [
    {
      "ScreenSize": 18,
      "Url": "xxx.xxx.xxx.xxx",
      "ConnectionType": 1,
      "Group": "MyGroup",
      "ID": "1",
      "Name": "server1",
      "OpenEmbedded": true,
      "credentials": {
        "Username": "Administrator",
        "Password": "mypassword123"
      },
      "Username": "Administrator",
      "Password": "mypassword123",
      "CredentialsMode": "Link", // I also tried "Linked"
      "CredentialID": "creds",
      "RDP": {}
    }
  ]
}

Ideally, I'd like to to set all my servers to link to "creds" so I can set the same username and password for all of them. That way when I import 50 servers I don't have to go into each one and set different passwords. I realise this is not very secure but they'll only be up for an hour or two.