What is an alternative for New-Object Microsoft.SharePoint.SPFieldUserValue () in CSOM Powershell

I want to get the full name of created and modified by the fields for a user in a SharePoint 2013 list by using CSOM in PowerShell. I know this can be achieved by New-Object Microsoft.SharePoint.SPFieldUserValue () but I want an alternative to this in CSOM powershell. Please help.