public function removeCoupon(string $subscriptionId)
    {
        // Log Debug
        $this->flow->getLogger()->debug("Removing Coupons from $subscriptionId");

        return $this->make(
            $this->flow->send(
                'post',
                $this->endpoint . '/deleteCoupon',
                ['subscriptionId' => $subscriptionId]
            )
        );
    }