FTPS download with implicit hostcertificatefingerprint

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PowerShell

I need help in downloading files from FTPS server via PowerShell with Implicit and having specific host fingerprint.

I have written a code like below

$user = 'Username'
$pass = 'password'
$folder = 'UST/Download'
$target = "D:\TCS_test"
$ftp = "ftps2-temp.tcsglobal.its.fincorp.net/TCS/Download"

#SET CREDENTIALS
$credentials = new-object System.Net.NetworkCredential($user, $pass)

function Get-FtpDir ($url,$credentials) {
$request = [Net.WebRequest]::Create("ftps2-temp.tcsglobal.its.fincorp.net/TCS/Download")
$request.Method = [System.Net.WebRequestMethods+FTP]::ListDirectory
$request.EnableSsl = $True
$request.UseBinary = $False
$request.UsePassive = $True
$request.KeepAlive = $False
if ($credentials) { $request.Credentials = $credentials }
$response = $request.GetResponse()
$reader = New-Object IO.StreamReader $response.GetResponseStream()
$reader.ReadToEnd()
$reader.Close()
$response.Close()
}


$folderPath= $ftp
Write-Output $folderPath
$Allfiles=Get-FTPDir -url $folderPath -credentials $credentials
$files = ($Allfiles -split "`r`n")

$files

$webclient = New-Object System.Net.WebClient
$webclient.Credentials = New-Object System.Net.NetworkCredential($user,$pass)
$counter = 0
foreach ($file in ($files | where {$_ -like "*.*"})){

Write-Output "file name"
Write-Output $file

$source=$folderPath + $file
$destination = $target + $file

Write-Output "source"
Write-Output $source

Write-Output "destination"
Write-Output $destination

$webclient.DownloadFile($source, $target+$file)

#PRINT FILE NAME AND COUNTER
$counter++
$counter
$source
}

What I have tried:

I am getting the below Error. I am not sure where to use

Implicit HostCertificateFingerprint. I have specific given fingerprint.

Exception calling "GetResponse" with "0" argument(s): "The remote name could not be resolved: 'ftps2-temp.tcsglobal.its.fincorp.net'"
At line:19 char:9
+         $response = $request.GetResponse()
+         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [], MethodInvocationException
    + FullyQualifiedErrorId : WebException
 
You cannot call a method on a null-valued expression.
At line:20 char:9
+         $reader = New-Object IO.StreamReader $response.GetResponseStr ...
+         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [], RuntimeException
    + FullyQualifiedErrorId : InvokeMethodOnNull
 
You cannot call a method on a null-valued expression.
At line:21 char:9
+         $reader.ReadToEnd()
+         ~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [], RuntimeException
    + FullyQualifiedErrorId : InvokeMethodOnNull
 
You cannot call a method on a null-valued expression.
At line:22 char:9
+         $reader.Close()
+         ~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [], RuntimeException
    + FullyQualifiedErrorId : InvokeMethodOnNull
 
You cannot call a method on a null-valued expression.
At line:23 char:9
+         $response.Close()
+         ~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [], RuntimeException
    + FullyQualifiedErrorId : InvokeMethodOnNull