RouteServiceProvider model bindings with OAuth2: accessing session data without token

I'm using Lucadegasperi's OAuth2 integration with Laravel 5.1.

I want to create a Tutorial instance, and want to simply pass the ID via the route from the client application, and have Laravel typehint it and auto-instantiate the model App\Tutorial for ID 1.

To do this, in my RouteServiceProvider's boot method, I bind the model:

public function boot(Router $router)
{
   parent::boot($router);
   $router->model('tutorial', 'App\Tutorial');
   ...
}

Which allows me to typehint and instantiate the tutorial model as {tutorial}:

$router->post('tutorials/{tutorial}/create', 'Resources\Tutorials@createManyToMany');

So when I call that route, which calls the Resources's createManyToMany method:

public function createManyToMany(Request $request, Route $route, Model $modelToAttach)
{
    // $modelToAttach of type Model will be auto-instantiated as App\Tutorial
    ...

The model will be good to go.

The issue is, I wrap these routes in Lucasdegasperi's OAuth2 middleware:

$router->group(['middleware' => 'oauth'], function(Router $router) {
    // routes

The server complains:

NoActiveAccessTokenException in Authorizer.php line 104:

Tried to access session data without an active access token

via Chebli Mohamed