webapp/routes/web.php

<?php

/*
|--------------------------------------------------------------------------
| Application Routes
|--------------------------------------------------------------------------
|
| Here is where you can register all of the routes for an application.
| It is a breeze. Simply tell Lumen the URIs it should respond to
| and give it the Closure to call when that URI is requested.
|
*/
/** @var \Laravel\Lumen\Routing\Router $router */
$router->get('/', 'HomeController@home');

$router->post('/api/register', 'UsersController@create');

$router->post('/api/links', [
    'middleware' => 'auth',
    'uses' => 'LinksController@add'
]);