Hi,
We have changed our domain (and therefor google oauth domain), so we lost access to our account. How can we get in touch with support to get it back?
Hi… You can email billing@fly.io for help with account recovery, as well as all other account-management topics:
https://fly.io/docs/about/support/#billing-and-account-support
(They can have a bit of queue near the beginning of the month, though, as everyone suddenly has questions about their latest invoice, etc.)