introducing the controller which handles admin actions on movies
added the add a new movie form request listener
renamed the class introduction comment
added the method which listens to the add a new movie form request
removed the listener of a movie add action from the user's index
updated the menu link to allow admin to request for add a new movie form
now checks if it is requested to show an add a movie form
removed the add a new movie form from this template
now including the AdminOnMovieController
updated the path to movies data, because it's called from within the admin index