Can we connect to the MySQL instance with PHPMyAdmin? If so, would we need to change anything with the docker/guac config?
edit: I setup a separate MariaDB docker, created a new database and user, imported the two sql files, changed the guacamole.properties to point to the docker IP. This was useful as only one user in my Guacamole instance needs to be using TOTP, whereas all the others authenticate via an SAML app with its own TOTP style setup.