Create a log in form

A form that allows to input a username and the password should appear. At the moment users don't have an ability to create accounts, so we need only to check whether there is such a user in our database, if there is, we need to authenticate and authorize him no matter what password he specified.

• All the pages should be secured and if the user is not authenticated, he should be redirected to log in page.
• If user specified a name that is absent in our database, then an error should appear 'Username or password is wrong, try once again'.
• If user specified correct username, he should be able to see the main admin page and to click on any menu item.

Take a look at malina project that contains similar functionality for the reference.