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

    $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 }