As others have mentioned, they changed the login to your 10 digit member ID. Ummm .... guess what, that is the reason I'm trying to log in, to retrieve and show that number that I WILL NEVER REMEMBER.
Add to that, if you do log in it displays your card in landscape while the phone is oriented in portrait. In other words, it's sideways. Easy to fix right? Just rotate your phone? Yeah, once you do that it goes all wonky and half your "card" is displayed in the lower left corner. Once that happens, you can't get the original image back even if you rotate your phone.
I'm fine with this app doing one thing. I don't expect much. But the one thing it's supposed to do (display your card) it fails at miserably. Therefore this app *literally* has no purpose.