Target [Dingo\Api\Contract\Routing\Adapter] is not instantiable while building [Dingo\Api\Routing\Router] in Laravel 5.4

I have installed Dingo api version of

> "dingo/api": "2.0.0-alpha1"

Installed successful but after execute the following artisan command

`php artisan vendor:publish --provider="Dingo\Api\Provider\LaravelServiceProvider"`

but it's not generate the `api.php` file in config folder. after that I'm going to define route file as following

```
$api = app('Dingo\Api\Routing\Router');

$api->version('v1', function ($api) {
$api->group(['middleware' => ['api']], function($api) {
$api->get('test', 'App\Api\Controllers\APIController@test');
});
});

```

Once I hit the url `http://localhost/restful_api/api/test` it's return exception

> (1/1) BindingResolutionException
> Target [Dingo\Api\Contract\Routing\Adapter] is not instantiable while building [Dingo\Api\Routing\Router].

Please help me for the same. I have follow step by` https://github.com/dingo`

Thank you