Get user from request always returns null (only Auth::guard('api') works) #237

Route::get('/user', function (Request $request) {
    return $request->user();
})->middleware('auth:api');
On the auth.php file, I have this:
    'defaults' => [
        'guard' => 'api',
        'passwords' => 'users',
Also, the middleware for auth is:

 'auth' => \Illuminate\Auth\Middleware\Authenticate::class,
In the RouteServiceProvider, I have this:
Route::group([
            'namespace' => $this->namespace,
            'middleware' => 'api',
            'prefix' => 'v1',
        ], function ($router) {
            require base_path('routes/api.v1.php');
And the API middleware group is:




    

    protected $middlewareGroups = [
        'api' => [
            'throttle:100,1',
            'bindings'
In my AuthServiceProvider, I followed some suggestions to add this:
        Passport::tokensExpireIn(Carbon::now()->addDays(15));
        Passport::refreshTokensExpireIn(Carbon::now()->addDays(30));
But, the weird thing is that I managed to pass the middleware, but the method $request->user() is always null, I tried with Password Grant and Personal Access Clients.
Then, I'm trying to use Scopes, but I can't pass them because of this issue, then, my only idea for the moment is creating a custom middleware that uses Auth::guard('api')->user() which works without issues.
Did I miss something on this?
Thanks