Missing Method in PostsController

You are seeing this error because the action authors is not defined in controller PostsController

Notice: this error is being rendered by the app/views/errors/missing_action.thtml view file, a user-customizable error page for handling invalid action dispatches.

Fatal: Create Method:

<?php
    class PostsController extends AppController
    {
        function authors()
        {

        }
    }
?>

in file : app/controllers/posts_controller.php

Error: Unable to execute action authors in PostsController