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.
|
*/
$router->group(
    [
        'prefix' => '/users'
    ], function ($router) {
        $router->get('/', 'UserController@index');
        $router->post('/', 'UserController@store');
        $router->get('/{id}', 'UserController@show');
        $router->put('/{id}', 'UserController@update');
        $router->delete('/{id}', 'UserController@delete');
    }
);