I have a backdoor into my home vpn using a series of usernames, passwords, and long obfuscated http paths/subdomains.
In an absolute emergency, I can traverse that maze, retrieve a key+config to connect to openVPN, then reach my vaultwarden vault. No 2fa on that vault as it’s not accessible from WAN. (though technically I could add 2fa and still be able to disable just the 2fa from vaultwardens admin console in a pinch)