vRA Settings > Licensing Where to get it?

hi guys

I working on vRealize Automation Center version 6.2.1 I following the PDF Guide to implement...

Right now I am here

15 Configure the license to enable the Infrastructure tab on the vRealize Automation console.

     a Click vRA Settings > Licensing.

     b Click Licensing.

     c Type a valid vRealize Automation license key that you downloaded when you downloaded the

installation files, and click Submit Key.

So my quesiton is where to I get that license? for what I understand is really needed for the Infrastructure Tab to show up and work....

if this is a POC for my company where do I get that?

I have access to keys and stuff in my vmware profile but I don't see it I search for VRA and nothing comes up

update

I just logged it to the vcac web and I get this error is it related I think

thanks