Your situation might be different - my Registration number is slightly different to my account number. The first 6 digits are the same, but the last two are different. It's so long since I habitually log in on my laptop that I've often got difficulty remembering the different reg code (and my phone remembers it for me, and has FaceID setup so I don't get asked). Just in case you have a different number too.I thought you might be onto something. But the Registration number is the same as my account number.