Right now, standard credit card payments and PayPal are accepted for autoships. Venmo and Google Pay can't be used with our autoship program.
If you have a store credit, there is currently no automatic way to apply it to an upcoming shipment. However, you can always contact us when your next order is placed and we can refund you the store credit amount on that order. Please do this the same day while we can still edit certain parts of the payment.