Visited today without charging.
There's no gate, the chargers are accessible, but being a garage I don't expect them to be kept available all the time.
The AC chargers don't have QR codes, but almost unexpectedly for a garage we can find QR codes on the DC charger! But these QR codes come with their own mystery. The left QR with number "1" printed actually points to connector "#2" on eCarUp and the right QR with printed "2" points to connector "#1". I'm not sure whether the QR codes are positioned correctly. Next to the QR are mystery keywords, DW8BNMW
for left and A4JPD6Z
but those don't appear to be valid eCarUp codes.
EDIT: the mystery values seem to be the last 7 characters of the EVSEID.