Compare KEEPASS CSV to haveibeenpwned

#RUN AS ADMIN. WILL ERROR OUT ON CONNECTION
CLS

#SET TLS 1.2
[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12

Function Get-StringHash([String] $String,$HashName = "MD5") 
{ 
    $StringBuilder = New-Object System.Text.StringBuilder 
    [System.Security.Cryptography.HashAlgorithm]::Create($HashName).ComputeHash([System.Text.Encoding]::UTF8.GetBytes($String))|%{ 
    [Void]$StringBuilder.Append($_.ToString("x2")) 
    } 
    $StringBuilder.ToString() 
}

#KEEPASS EXPORT CSV
$mycsvpath = "D:\temp\mykeepassexport.csv"
$passwordcsv = Import-Csv -Path $mycsvpath
$passwords = $passwordcsv|select password|sort password|get-unique -asstring


foreach ($password in $passwords)
{
    $hash = Get-StringHash $password.password "SHA1"

    $hash4 = $hash.Substring(0,5)
    $hashsub = $hash.Substring(5)


    $ami = Invoke-RestMethod "https://api.pwnedpasswords.com/range/$hash4" -UseBasicParsing -ContentType "application\json"
    $amiarray = @()
    $amiarray = ($ami -split '[\r\n]') |? {$_}

    $found = $null
    $found = $amiarray|?{$_ -like "$hashsub*"}

    if ($found)
    {
    $temp = $found -split ":"
    write-host "FOUND: $hash $($temp[1]) times for Password: $($password.password)" -ForegroundColor Red

    }

}