Openvpn-as default admin credentials won't work

I’ve installed the openvpn-as docker container. On the guide page the default credentials are admin/password. When logging in the webgui i recieve the following error;
SESSION ERROR: SESSION: Your session has expired, please reauthenticate (9007)

How can i reset the admin credentials without having access to the webui?

More people has this issue, but the given fix is using an older version

See here: Just installed openvpn-as can't login as admin

That was the trick, thanks!