Power type

I installed the MAAS in a machine which created by VMWare, and the step 1-6 have done ,but when i want to “commission” , it reminds me to enter the power type , and this is the question.I selected the “VMWare” in the drilldown,and then I entered the vsphere info ,but it warned me “certificate verify failed (_ssl.c:645)”, i am failed in this point.What I need to enter?or give an example for vmware,