Allow ssh access as different users

[beirigo]

I couldn't find a way to change the user (its using ubuntu) when trying to use ssh.
Would be nice if we could add the user to the config.json also.

I can come up with a PR later if you are willing to accept such feature

[skyebook]

@marcosbeirigo Don't know how I missed this when you first sent it, sorry about that!

Yes, am very willing to accept PR's :)