WhatTheHomePod_-_error_line_91

#INPUT PROMPTS

$Firstname   = Read-Host 'Firstname'
$Lastname    = Read-Host 'Lastname'
$initials    = Read-Host 'Initials (please use periods for example - J.A.)'
$UserID      = Read-Host 'UserID'
$department  = Read-Host 'Department'
$title       = Read-Host 'Title'
$description = Read-Host 'Employee ID'
$tstnr     = Read-Host 'Office Phone'
$CopyFromUser = Read-Host 'Copy rights from to (if not - push on enter)'
$OUPath      = Read-Host 'Intern or Extern'



function New-DisplayName
    {

    <#
    CBH [Comment Based Help] goes here
    #>

    [CmdletBinding ()]
    Param
        (
        [Parameter (
            Mandatory,
            Position = 0
            )]
            [string]
            $FirstName,

        [Parameter (
            Mandatory,
            Position = 1
            )]
            [string]
            $LastName

        )

    begin {}

    process
        {
        $SplitLName = $LastName.Split(' ')
        $PartOne = $SplitLName[-1]
        $PartTwo = $FirstName[0]

        if ($SplitLName.Count -gt 1)
            {
            $PartThree = $SplitLName[0..($SplitLName.Count - 2)] -join ' '

            '{0}, {1}. {2} ({3})' -f $PartOne, $PartTwo, $PartThree, $FirstName
            }
            else
            {
            '{0}, {1}. ({2})' -f $PartOne, $PartTwo, $FirstName
            }

        }

    end {}

    } # end >> function New-DisplayName

#USED FOR OUPATH
$OUPathValidate = $true
While ($OUPathValidate) {
    If ($OUPath.ToUpper() -eq 'Intern') {
        $OUPath = 'OU=Intern,OU=Users,OU=ZERO,DC=int,DC=rpz,DC=nl'
        $OUPathValidate = $false
    } ElseIf ($OUPath.ToUpper() -eq 'Extern') {
        $OUPath = 'OU=Extern,OU=Users,OU=ZERO,DC=int,DC=rpz,DC=nl'
        $OUPathValidate = $false
    } Else {
        Write-Host 'Unknown value - User Intern or Extern'
    }
}

# check if the user ID exists in AD
if (Get-ADUser -Filter { SamAccountName -eq $UserID })
{
    # if it exists, create a loop and get the first free name with a number behind, starting at 2
    $userNotFound = $true
    $count = 1
    while($userNotFound -eq $true)
    {
        $count++
        # create a temporary variable with the new name to check with
        $tempID = "$userid$count"
        if (-not (Get-ADUser -Filter { SamAccountName -eq $tempID }))
        {
            $userNotFound = $false
        }
    }
    # set the user ID to the new name
    $UserID = "$($UserID)$count"
}

#STATIC VARIABLES
$Password     = (ConvertTo-SecureString -AsPlainText 'ZERO' -Force)
$company      = 'ZERO'
$Displayname = New-DisplayName -FirstName $FirstName -LastName $LastName
$profilePath  = "\\int.ZERO.nl\Users\Profiles\$UserID"
$OfficePhone  = $tstnr
$aliasid      = $UserID.Insert(1,'.')


#USED TO ADD PARAMETERS
$Parameters = @{
    'SamAccountName'        = $UserID
    'UserPrincipalName'     = $UserID
    'Name'                  = "$Firstname $Lastname"
    'GivenName'             = $Firstname
    'Surname'               = $Lastname
    'DisplayName'           = $Displayname
    'AccountPassword'       = $password
    'ChangePasswordAtLogon' = $true
    'Enabled'               = $true
    'Path'                  = $OUPath
    'company'               = $company
    'department'            = $department
    'description'           = $description
    'title'                 = $title
    'profilePath'           = $profilePath
    'OfficePhone'           = $OfficePhone
    'initials'              = $initials

}

"Username = $UserID"
New-ADUser @Parameters