Laravel Cashier (Stripe) get subscription cost or coupon used?

I'm using Laravel Cashier with Stripe.

In my account panel I want to show users how much their monthly subscription is costing them.

Users can have a normal plan without a coupon or the same plan with a coupon that makes it half price.

Is there anyway Cashier can tell me how much the monthly subscription is costing them or if they signed up using a coupon? Or is this something I have to store in my own database at the time they subscribe?

via Chebli Mohamed