PowerShell - Add/Join Computer to domain

$pc = "PC-01"
$domain = "Domain"
$user = "Administrator"
$pass = cat C:\securestring.txt | convertto-securestring
$username = "$domain\$user"
$computer = "NewPCName"
$credential = New-Object System.Management.Automation.PSCredential($username,$pass)
Add-Computer -ComputerName $pc -DomainName $domain -newname $computer -OUPath "OU=group1,DC=testing,DC=com" -Restart -Force -Credential $credential
EXIT