I'm not seeing the reply from Matej here so I'm sharing it - hope that's ok:
> Hi, the account was maintained by me, Peter (I think), and I think Pivnik and Mark had also access. The purpose of the account was to make difference between one man show and something potentially bigger.
I think shared accounts (credentials) are problematic, in particular when you pay for the account.
I'm happy to make anybody willing to help out a co-organizer, but this should be an individual rather than an opaque shared account.
As a last resort, there's always an option to transfer an ownership of a meetup account.