* @property string $id Unique identifier for the object.
* @property string $object String representing the object's type. Objects of the same type share the same value.
* @property null|int $amount_off Amount (in the <code>currency</code> specified) that will be taken off the subtotal of any invoices for this customer.
* @property \Stripe\StripeObject $applies_to
* @property int $created Time at which the object was created. Measured in seconds since the Unix epoch.
* @property null|string $currency If <code>amount_off</code> has been set, the three-letter <a href="https://stripe.com/docs/currencies">ISO code for the currency</a> of the amount to take off.
* @property string $duration One of <code>forever</code>, <code>once</code>, and <code>repeating</code>. Describes how long a customer who applies this coupon will get the discount.
* @property null|int $duration_in_months If <code>duration</code> is <code>repeating</code>, the number of months the coupon applies. Null if coupon <code>duration</code> is <code>forever</code> or <code>once</code>.
* @property bool $livemode Has the value <code>true</code> if the object exists in live mode or the value <code>false</code> if the object exists in test mode.
* @property null|int $max_redemptions Maximum number of times this coupon can be redeemed, in total, across all customers, before it is no longer valid.
* @property null|\Stripe\StripeObject $metadata Set of <a href="https://stripe.com/docs/api/metadata">key-value pairs</a> that you can attach to an object. This can be useful for storing additional information about the object in a structured format.
* @property null|string $name Name of the coupon displayed to customers on for instance invoices or receipts.
* @property null|float $percent_off Percent that will be taken off the subtotal of any invoices for this customer for the duration of the coupon. For example, a coupon with percent_off of 50 will make a %s100 invoice %s50 instead.
* @property null|int $redeem_by Date after which the coupon can no longer be redeemed.
* @property int $times_redeemed Number of times this coupon has been applied to a customer.
* @property bool $valid Taking account of the above properties, whether this coupon can still be applied to a customer.