I see, I figured as much. Their menu system mentions the Apple Master Card. The GS representative was stumped as to why my Apple ID and password were not working. He said it must be Apple as “their card is their own institution.” Weird and confusing. I‘m sure GS isn’t immune from hacks and data leaks, etc. Also Paid, the company that makes the linkage, mentions multiple banking institutions within GS and tries to link but fails at the login. So GS clearly allows Plaid to connect. This must be on Apple’s side. I’m assuming the correct bank that the Apple MC uses is “Marcus Goldman Sachs” from what I can find on the Marcus GS customer support.