ClearBowl/api/routes/api.php

<?php

use Illuminate\Support\Facades\Route;

Route::group(['prefix' => 'user', 'middleware' => ['assign.guard:users']], function () {
    Route::post('/register', 'UsersController@register');
    Route::post('/login', 'UsersController@login');
    Route::get('/me', 'UsersController@me');
});

Route::prefix('product')->group(function () {
    Route::post('/', 'ProductsController@add')->middleware(['assign.guard:users']);
    Route::get('/', 'ProductsController@index');
});