function GetContactsFromListBrevo {
    $headers = @{
        "accept"  = "application/json"
        "api-key" = ""
    }

    $response = Invoke-WebRequest `
        -Uri 'https://api.brevo.com/v3/contacts/lists/9/contacts?limit=50&offset=0&sort=desc' `
        -Method GET `
        -Headers $headers

    return $response.Content | ConvertFrom-Json
}

$contacts = GetContactsFromListBrevo
$contacts.count
$contacts.contacts | ForEach-Object { $_.email }