How do I backup and restore my site along with all content?

I'm wondering how do I backup my site and content as I'm guessing the edits are in Mongo?

I've tried using the backup command with wagon 2.2.0 but I always get this error:

Locomotive::Coal::UnauthorizedError

Does this backup (if it works) give me a full backup with all site content? If so how to I restore the backup?