refactor New-LocalAccount function to accept plain text password and hide user from login screen

Tools.ps1

@@ -708,12 +708,14 @@ Function IsRunning ([Parameter(ValueFromPipeline=$true)][string]$Name) {
 Function New-LocalAccount {
     param(
         [Parameter(Mandatory=$true)][string]$Username,
-        [Parameter(Mandatory=$true)][SecureString]$Password,
+        [Parameter(Mandatory=$true)][string]$Password,
         [Parameter(Mandatory=$true)][string]$FullName,
         [Parameter(Mandatory=$true)][string]$Description,
         [Parameter(Mandatory=$false)][switch]$MakeAdmin=$false,
         [Parameter(Mandatory=$false)][switch]$Hide=$false
     )
+    $SecurePassword = ConvertTo-SecureString -String $Password -AsPlainText -Force
+    $Password = $null
     If ( -not (IsAdmin) ) {
         Write-Output "Cannot create or modify a local account without administrative privileges"
         Return
@@ -738,8 +740,21 @@ Function New-LocalAccount {
         Catch { Write-Error $_.Exception.Message ; Exit }
     }
     If ( $Hide ) {
-        # TODO: Hide account from logon screen
-        #Get-ChildItem "HKLM:SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\SpecialAccounts\UserList"
+        $RegPath = "HKLM:SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\SpecialAccounts\UserList"
+        $HideUser = $true
+        If ( -not (Test-Path $RegPath) ) {
+            New-Item -Path $RegPath -Force | Out-Null
+        } Else {
+            $UserList = Get-ItemProperty -Path $RegPath
+            ForEach ( $User in $UserList.PSObject.Properties ) {
+                If ( $User.Name -ieq $Username ) {
+                    Write-Output "The user ""${Username}"" is already hidden from the login screen"
+                    $HideUser = $false
+                    Break
+                }
+            }
+        }
+        If ( $HideUser ) { New-ItemProperty -Path $RegPath -Name $Username -Value 0 -PropertyType DWord -Force | Out-Null }
     }
 }