How to convert a windows user name to claims user name using PowerShell

#read the user name

$claimsUserID = read-host -prompt ‘Enter windows user name in format DOMAIN\UserName :’

#convert the user name to claims id
$claimsUserID = New-SPClaimsPrincipal -Identity $claimsUserID -IdentityType WindowsSamAccountName

$claimsUserID = $claimsUserID.ToEncodedString()

#display the claims id
write-host ‘Claims user ID is ‘ $claimsUserID