How to configure fence vmware soap at vCenter

Hi..

I have vCenter version 6 and RHEL 7 HA require fencing.  I am planning to use agent fence_vmware_soap as fencing.  But from vmware/vCenter side what shall I do and how can I create id and password.  Because this is command I need to run from

# fence_vmware_soap -a vcenter-IP -l username -p password --ssl -z -v -o list |grep <name_of_virtual-machine_on ESX_host>