Get host WWPNs

I am new to VCO.  I currently automate a lot of stuff in powershell, but I am now in the process of porting those over to vCO workflows and am trying to keep everything native to vCO without having to use the powershell plugin.  I currently have a powershell script that gathers the WWPNs of all hosts in a cluster so that I can put together a storage request for our storage team.  I am trying to accomplish the same thing in vCO.  I have create a loop so far that can list all the hosts in a cluster, but now I am trying to gather the WWPN as an array, but I am stuck.  Any help at this step would be great.