USER STORY: Basic user sign-in

[dragon-fire-fly]

As a registered user I can log in to my user account so that I can access full functionality of the site

Acceptance Criteria

• Sign-in form renders correctly on sign in page
• Correctly entered credentials lead to successful log in
• Log in is acknowledged with a welcome message

Tasks

• [x] Check entered credentials against those stored in the database
• [x] Determine whether user is authenticated or not
• [x] Show whether user is logged in or not
• [x] Allow access to restricted areas of the site (to an appropriate security level)