Working with Freshdesk contacts in powershell

Get all freshdesk contacts in Powershell

function Get-LogetoFreshdeskContacts 
{
    [CmdletBinding()]
    param (
        [parameter(Mandatory=$true)]
        [string]$FreshdeskDomain,
        [parameter(Mandatory=$true)]
        $ApiKey
    )

    $base64AuthInfo = [Convert]::ToBase64String([Text.Encoding]::ASCII.GetBytes(("$($ApiKey):X")))

    $freshdeskContacts = New-Object System.Collections.ArrayList($null)
    $pagesPerRequest = 100
    $page = 1

    do
    {
        $url = "https://$FreshdeskDomain.freshdesk.com/api/v2/contacts?page=$page&per_page=$pagesPerRequest"
        $items = Invoke-RestMethod -Headers @{Authorization=("Basic $base64AuthInfo")} -Uri $url -Method Get
        $freshdeskContacts.AddRange($items)
        $page++
    } while ($items.Length -ne 0)

    return $freshdeskContacts
}

Add or update freshdesk contact in Powershell

function Set-LogetoFreshdeskContact 
{
    [CmdletBinding()]
    param (
        [parameter(Mandatory=$true)]
        [string]$FreshdeskDomain,
        [parameter(Mandatory=$true)]
        $ApiKey,
        [parameter(Mandatory=$true)]
        $Contact       
    )

    $base64AuthInfo = [Convert]::ToBase64String([Text.Encoding]::ASCII.GetBytes(("$($ApiKey):X")))

    $url = "https://$FreshdeskDomain.freshdesk.com/api/v2/contacts"

    if ($Contact.id)
    {
        $method = [Microsoft.PowerShell.Commands.WebRequestMethod]::Put
        $url += "/$($Contact.id)"
        $Contact.Remove("id") ## Avoid Unexpected/invalid field in request
    }
    else 
    {
        $method = [Microsoft.PowerShell.Commands.WebRequestMethod]::Post      
    }

    return Invoke-RestMethod -Headers @{Authorization=("Basic $base64AuthInfo")} -Uri $url -Method $method -Body ($Contact | ConvertTo-Json) -ContentType "application/json; charset=utf-8"
}