added the create and user_params methods inside the admin::usercontroller
Wrote test to have an admin sign up
Added admin checkbox to the user sign-up form to allow potential users to mark themselves as an admin
defined to_s method that will return admin if the user is an admin, or user if they are not
completed feature to create admin users through the admin backend
wrote tests for editing an admin user
added validation for the presence of emails to the user model
added sequences to the user factory to increment each email by 1 number
defined the show method in the admin users controller
edit and update functionality now implemented for admin users
admin can now delete a user
implemented functionality so admin users cannot delete themselves