Add two user account levels to an existing MEAN.js site

There is a large, existing [login to view URL] site on GitHub that you will be working with. It already has user access control, but it only has one level - Admins. It has two viewing modes, a preview mode, and an authoring mode Tasks: 1. Add a hard-coded, default admin account that will allow for access to the site's authoring features. This will also allow the site to be run from a new server with an empty MongoDB database. The admin account must not be valid anymore once at least one other admin account has been created. 2. Hide any existing CREATE or EDIT buttons or links unless the user is logged in, and is part of the admin group. Also hide project navigation drop-down links that appear on the left of the main content 3. Add a second account level that can only view the existing preview mode of the site. 4. Add a form that allows for batch creation of second level accounts. Message me and ask for the link to the GitHub repo if you feel that this should be a fairly quick, one or two day task.