rayayton

[zinc kayak]

Hello! Generally, the way you would do that is by updating the Subscription and changing the quantity of the subscription item (https://stripe.com/docs/api/subscriptions/update#update_subscription-items-quantity)

We have an example that isn't exactly what you need but demonstrates the general idea but it's changing the price instead of the quantity - https://stripe.com/docs/billing/subscriptions/upgrade-downgrade#changing

Since you're using the firebase extension though I'd recommend talking to invertase's support to get more help