Get VM owner r on behalf of owner from vcac for requested VM (using vco).

Question

I am trying to get the VM owner from vcac for pre-provisioning purposes.  I cannot find it in properties of the VM. 
Can someone point me in the right direction?
I'm passing the VCAC:Entity, VCAC:VirtualMachine, The VCAC VM Propertys as an array into my flow.  The owner is eluding me.
Thanks!

Answer 1

Anyone know how to change the __Legacy.Workflow.User property?
setting either or both __Legacy.Workflow.User __Legacy.Workflow.ImpersonatingUser has no effect
Using vCO SDK to request catalog item.
                string attributes;
                attributes = "TotalStorageSize,string," + storage;
                attributes += ",DNSServer,string," + domainController;
                attributes += ",DNSZone,string," + domain;
                attributes += ",ServerDomain,string," + domainPrefix;
                attributes += ",ServerHostName,string," + hostName;
                attributes += ",ServerType,string," + serverType;
                attributes += ",isDMZ,string," + isDMZ;
                attributes += ",AdMachineCleanupDomain,string," + domainController;
                attributes += ",VirtualMachineCPUCount,string," + cpuCount;
                attributes += ",disks,string," + disks;
                attributes += ",VirtualMachineMemorySize,string," + memory;
                attributes += ",VirtualMachineNetwork0ProfileName,string," + vlan;
                attributes += ",__request_reason,string," + __request_reason;
                attributes += ",provisioningGroupId,string," + PRE_provisioningGroupId;
                attributes += ",item,vCACCAFE:CatalogItem," + dunes_blueprintURI;
                attributes += ",requestor,string," + requestor;
                WorkflowToken wfToken = new WorkflowToken();
                wfToken = vCO.ExecuteWorkflow("33295b30-24e5-4938-be99-7168ac0ca05c", vCACAdminUser, vCACAdminPW, attributes);
In the workflow I am setting
var jsRequestor = { name: "provider-__Legacy.Workflow.ImpersonatingUser", value: requestor};
param.push(jsRequestor);
var jsRequestor2 = { name: "provider-__Legacy.Workflow.User", value: requestor};
param.push(jsRequestor2);