Today, when you start cockroach demo, we start the interactive SQL session for root and the connection strings printed in the demo welcome text are customized for root. Instead, it would be great to:

1. Auto-create a non-root user and password
2. Log into the SQL shell with that user
3. Customize the connection strings for that user

The connection strings in particular would encourage the best practice of using non-root users for app connections to the db.

I'm not certain about #2, however. It might be important for the auto-logged in user to have admin privileges, for example, to create new databases, grant privileges to other users, etc.