I have one hassos with installed mariadb addon, and try to connect from another hassos with recorder.
I get error: Error during connection setup: (MySQLdb._exceptions.OperationalError) (1045, "Access denied for user 'admin'@'ip_of_my_connecting_host' (using password: YES)")
Also, MariaDB does not allow any connections other than from “localhost” as standard. I know you need to change some config (can’t remember where or how) to allow external connections.