title: Finishing trial early in Stripe
body: <p>I have a thirty-day free trial of my subscription in Stripe.
  I want users to have the option of paying early, at which point their remaining trial days will be added to the end of their first billing term.</p>
  
  <p>If I set the subscription's trial_end and billing_cycle_anchor to the current timestamp, will the user be invoiced immediately? Or would it be best to cancel their existing subscription and create another without a trial?</p>
  
  <p>Then, I guess, put the remaining trial days on to the newly created billing_cycle_anchor and prorate=false?</p>
  
  <p>Thanks</p>