public function delete($authyId, $ip = null): Response
    {
        // Prepare required variables
        $url = $this->api."users/{$authyId}/delete";
        $params = $this->params + ['form_params' => ['ip' => $ip]];

        // Delete Authy user, and return response
        return new Response($this->http->post($url, $params));
    }