Re-route DashboardsController routes to /dashboard and disable original/default route to /dashboards

gistfile1.php

<?php
/**
 * CakePHP 3.x Routes configuration (/config/routes.php)
 */

use Cake\Core\Plugin;
use Cake\Routing\Router;

Router::scope('/', function ($routes) {

	/**
	 * Enable RESTful routes for our controllers.
	 */
	$routes->extensions(['json']);

	/**
	 * Connect /dashboard URLs to DashboardsController and disable /dashboards route.
	 */
	$routes->connect('/dashboards/*', ['controller' => null]);
	$routes->connect('/dashboard', ['controller' => 'Dashboards', 'action' => 'index'], ['routeClass' => 'InflectedRoute']);
	$routes->connect('/dashboard/:action/*', ['controller' => 'Dashboards'], ['routeClass' => 'InflectedRoute']);

	/**
	 * Here, we are connecting '/' (base path) to a controller called 'Pages',
	 * its action called 'display', and we pass a param to select the view file
	 * to use (in this case, src/Template/Pages/home.ctp)...
	 */
	$routes->connect('/', ['controller' => 'Pages', 'action' => 'display', 'home']);

	/**
	* Connect a route for the index action of any controller.
	* And a more general catch all route for any action.
	* Using InflectedRoute so HtmlHelper::Link() will generate lowercase URL's
	*/
	$routes->connect('/:controller', ['action' => 'index'], ['routeClass' => 'InflectedRoute']);
	$routes->connect('/:controller/:action/*', [], ['routeClass' => 'InflectedRoute']);

	/**
	* Load all plugin routes.
	*/
	Plugin::routes();

});