non-automatic nitro payment

while probably I'm in minority, I'd like discord do add option to use non-automatic payments for nitro. While i understand this is subscription model, but sometimes discord pull cash from my account before i actually get funds for nitro, ending with them pulling cash i have for public transport. Adding option for use to have confirm payment in client would help prevent that, and allow to pay when funds are actually ready. This change could also allow to pay few days in advance of normall payment than on specific day. While probably not many people would want that, i still think it would be great help to people that are not always ready on spot for payment