Spark, Stripe & Authorizing Credit Card Before Charging

Hello,

I need to setup my Spark app such that I authorize a credit card but do not charge it right away. Basically, I want to be able to "approve" a customer before the credit card is charged, but the approval process should only begin after the credit card is saved and authorized:

https://support.stripe.com/questions/does-stripe-support-authorize-and-capture

How can I implement something like this with Spark?