Yes, you'll need it in your config file. Just replace redis with mongo phrase or use setup to generate config.json.
SOLVED How do you show a user's group next to their name?
Is there a settings option or plugin which enables the group to be displayed next to a users name? For example, in this post user pichalite is in the 'PLUGIN & THEME DEV' group. I have several users in groups on my board but their groups are not displayed next to their name as above. Is there a special way to enable this?
Within your user settings within the category Groups you may select a group label.