I know there was a way to do so when running Screenly OSE on Raspbian, but I haven’t been able to do the same using the BalenaOS.
Currently, there is no way to setup a user/password to enter the admin screen on screenly via balena dashboard.
But you can edit the file
./ansible/roles/screenly/files/screenly.conf where it says
Quick question, on Raspbian, what is the way to set the login/password?
Ps: I have not tested this yet.