Stripe - saving card to customer

Need some help.

I have a workflow that creates a new Stripe customer and then saves the Stripe customer ID. Then later in the workflow I have another action to capture the cc info of the current user, however, this is creating a new customer in stripe with the same email instead of adding the card to the existing customer.

How can I set this up to save the card info to the just-created customer instead of creating a new customer in stripe?

I am using the bubble stripe plugin as well as the API connecter to create the customer.

Stripe automatically saves the card