Hi there, Scalingo CTO here, all our databases are protected with password. I've been able to reproduce the issue on our public adminer instance: https://adminer.scalingo.com, we're currently looking out why adminer fails to connect. It also seems to be it's because of the replicaset part. We're looking deeper. Could you please reach us through the in-app dashboard of the platform, we'll help you finding out why you can't use adminer. -- Léo Unbekandt