Public/Get-CurrentUserName.ps1

function Get-CurrentUserName
{
    <#
        .DESCRIPTION
            Search for an active user login and return the name of the user
    
        .EXAMPLE
            $User = Get-CurrentUserName
    
        .NOTES
            Created by: Jon Anderson
            Modified: 2023-07-03
    #>

    Write-LogEntry -Value "Checking for an active user login" -Severity 1
    $User = (Get-CimInstance -ClassName Win32_ComputerSystem).UserName
    if([String]::IsNullOrEmpty($User))
    {
        Write-LogEntry -Value "No logged in user found" -Severity 1
        return $null
    }
    else
    {
        $UserName = $User.Split('\')
        if([String]::IsNullOrEmpty($UserName[1]))
        {
            Write-LogEntry -Value "No logged in user found" -Severity 1
            return $null
        }
        else
        {
            Write-LogEntry -Value "Found active user login: $($UserName[1])"
            return $UserName[1]
        }
    }
}