Can you use carecredit without the physical card/digital card?

I’m taking my cats to the vet tomorrow, they’ve been peeing outside the box for a couple days and one has thrown up so it’s kinda urgent and can’t wait. I got a care credit acct 2 days ago and tried to print the temp card from the email and it literally will not work. I called customer service and she said I could get a digital card on the app. It’s not on there anywhere. I read that if a provider is in network with carecredit, they can just look up your acct and charge it. The vet does take carecredit I know. Anyone experience this?