How to rename the local Administrator account in server core

Enter this command to rename local Administrator account to a new name:
wmic UserAccount where Name="Administrator" call Rename Name="new-name"

In Windows Server 2012 Core we can utilize Powershell, so to find the Local Administrator account name we use the following command:
gwmi Win32_UserAccount | ? {$_.SID -Like 'S-1-5-*-500'}
In order to rename the Local Administrator account to another name we use the following command:
(gwmi Win32_UserAccount | ? {$_.SID -Like 'S-1-5-*-500'}).Rename("New-Name")