anchor.diff:      curl \
         --header "Content-Type: application/json" \
         --header "Authorization: Bearer $VAGRANT_CLOUD_TOKEN" \
  -      https://app.vagrantup.com/api/v1/box/myuser/test/version/1.2.3/virtualbox \
  +      https://app.vagrantup.com/api/v1/box/myuser/test/version/1.2.3/provider/virtualbox \
         --request PUT \
         --data '
           {
  
positive.code:       "Authorization" => "Bearer #{ENV['VAGRANT_CLOUD_TOKEN']}"
      )
  
      response = api.get("/api/v1/box/myuser/test/version/1.2.3/virtualbox/upload")
  
      if response.status.success?
        # Success, you can now upload the box image to the returned URL
  
negative.code:       "Authorization" => "Bearer #{ENV['VAGRANT_CLOUD_TOKEN']}"
      )
  
      response = api.put("/api/v1/box/myuser/test/version/1.2.3/provider/virtualbox", json: {
        provider: {
          name: "virtualbox",
          url: "https://example.com/virtualbox-1.2.3.box"
  