Credentials for login on serial connection

I’m sure this is available in the documentation but I simply cannot find it.

I am trying to access a RPI3 with an essentials container via a serial cable. The setup and connection is fine but I simply cannot find the credentials anywhere. What are the username and password?

Some more digging revealed the quite obvious answer.

user: root

Glad you figured it out!

If the device is connected to the network, you can also use resin local ssh to drop you in directly:

Also note this only works on development resinOS images, and login is disabled on production images.