Split Payments - Allow Manual payments

Currently only the auto-pay is set up to split payments between parents. It would be nice and helpful if the second contact on the account could log in and make a manual payment as well for parents who are splitting costs. They would like more control and access to their payment.

Allowing the second contact to also add their cc information directly to their account at their convenience instead of waiting for someone from the studio to be available to add it would be easier as well. Then both parents can have access to their payment options in the portal.