/**
  * @param        $token
  * @param        $amount
  * @param        $subscriptionName
  * @param        $clientId
  * @param string $currency
  * @param string $interval
  * @param null   $paymentId
  *
  * @return bool|SubscriptionPaymentResult
  */
 public function createSubscription($token, $amount, $subscriptionName, $clientId, $currency = 'EUR', $paymentId = null, $interval = '1 month', $trial = '1 week')
 {
     if (!$paymentId) {
         $payment = new \Paymill\Models\Request\Payment();
         $payment->setToken($token)->setClient($clientId);
         try {
             $response = $this->request->create($payment);
         } catch (\Paymill\Services\PaymillException $e) {
             s($e->getResponseCode());
             s($e->getStatusCode());
             s($e->getErrorMessage());
             return false;
         }
         $paymentId = $response->getId();
     }
     $subscription = new \Paymill\Models\Request\Subscription();
     $subscription->setClient($clientId);
     $subscription->setAmount($amount * 100);
     $subscription->setCurrency($currency);
     $subscription->setInterval($interval);
     $subscription->setPayment($paymentId);
     $subscription->setName($subscriptionName);
     $subscription->setPeriodOfValidity('10 YEAR');
     //        $subscription->setStartAt(strtotime(gmdate('Y-m-d 00:00:00', strtotime('+1 day'))));
     $subscription->setStartAt(time() + 3600);
     //        $subscription->setStartAt(time() + strtotime($trial)); // trial mode
     try {
         /** @var Subscription $response */
         $response = $this->request->create($subscription);
     } catch (\Paymill\Services\PaymillException $e) {
         s($e->getResponseCode());
         s($e->getStatusCode());
         s($e->getErrorMessage());
         return false;
     }
     return new SubscriptionPaymentResult(['subscription_id' => $response->getId(), 'payment_id' => $response->getPayment()->getId()]);
 }