Update users.md

[laudares]

The MySQL root password is no longer available as an environment variable inside the container. I provide a two-step approach that consists in grabbing the password from the secrets file first and storing it in a local env; maybe we want to provide a more detailed explanation instead.

[fiowro]

Our official method of getting root password is little bit different, it doesn't involve other programs like awk. It is described in connect.md and looks as follows:

kubectl get secret <secret-name> -n <namespace> --template='{{"{{"}}.data.root | base64decode{{"}}"}}{{"{{"}}"\n"{{"}}"}}'

Also, I'd recommend leaving this command untouched (involving environment variable to pass the password may be rather common, but definitely not required). Instead, I propose adding a note on how to acquire root password with our official way of doing it.