Guíeme implementando el servidor PHP Oauth2 usando la biblioteca depleague

estoy usandoSlim Framework ConEloquent ORM. Tratando de implementarhttps://github.com/thephpleague/oauth2-server pero estoy totalmente confundido sobre cómo hacer esto. Después de agregar esto con el compositor, creé la base de datos con el archivo sql proporcionado en este paquete.

Ahora se sugiereimplementar interfaces de almacenamiento. No quiero hacer esto, así que simplemente copié las clases de almacenamiento que se encuentran en la Carpeta de ejemplos. Supongo que deberían funcionar ya que estoy usando la misma base de datos, ¿verdad?

Tampoco está claro cómo sembrar inicialmente la base de datos. Aquí está mi enrutador donde estoy intentandopassword método.

$server = new \League\OAuth2\Server\AuthorizationServer;

$server->setSessionStorage(new SessionStorage);
$server->setAccessTokenStorage(new AccessTokenStorage);
$server->setClientStorage(new ClientStorage);
$server->setScopeStorage(new ScopeStorage);

$passwordGrant = new \League\OAuth2\Server\Grant\PasswordGrant();
$passwordGrant->setVerifyCredentialsCallback(function ($username, $password) {
    // implement logic here to validate a username and password, return an ID if valid, otherwise return false
    return 1;
});

$server->addGrantType($passwordGrant);

$app->post('/token',function() use ($server,$app){
    try{
        $response = $server->issueAccessToken();

        $res = $app->response();
        $res['Content-Type'] = 'application/json';

        $res->body(json_encode($response));

    } catch (\Exception $e) {

       var_dump($e);
    }

});

Estoy totalmente frustrado por lo que está sucediendo. Esto arroja la siguiente excepción. [He agregado alcanceok en db]

object(League\OAuth2\Server\Exception\InvalidScopeException)[82]
  public 'httpStatusCode' => int 400
  public 'errorType' => string 'invalid_scope' (length=13)
  public 'serverShouldRedirect' => boolean true
  protected 'message' => string 'The requested scope is invalid, unknown, or malformed. Check the "ok" scope.' (length=76)
  private 'string' (Exception) => string '' (length=0)
  protected 'code' => int 0
  protected 'file' => string 'C:\wamp\www\linkshare\vendor\league\oauth2-server\src\Grant\AbstractGrant.php' (length=77)
  protected 'line' => int 163
  private 'trace' (Exception) => 
    array (size=11)
      0 => 
        array (size=6)
          'file' => string 'C:\wamp\www\linkshare\vendor\league\oauth2-server\src\Grant\PasswordGrant.php' (length=77)
          'line' => int 130
          'function' => string 'validateScopes' (length=14)
          'class' => string 'League\OAuth2\Server\Grant\AbstractGrant' (length=40)
          'type' => string '->' (length=2)
          'args' => 
            array (size=2)
              ...
      1 => 
        array (size=6)
          'file' => string 'C:\wamp\www\linkshare\vendor\league\oauth2-server\src\AuthorizationServer.php' (length=77)
          'line' => int 330
          'function' => string 'completeFlow' (length=12)
          'class' => string 'League\OAuth2\Server\Grant\PasswordGrant' (length=40)
          'type' => string '->' (length=2)
          'args' => 
            array (size=0)
              ...
      2 => 
        array (size=6)
          'file' => string 'C:\wamp\www\linkshare\index.php' (length=31)
          'line' => int 67
          'function' => string 'issueAccessToken' (length=16)
          'class' => string 'League\OAuth2\Server\AuthorizationServer' (length=40)
          'type' => string '->' (length=2)
          'args' => 
            array (size=0)
              ...
      3 => 
        array (size=2)
          'function' => string '{closure}' (length=9)
          'args' => 
            array (size=0)
              ...
      4 => 
        array (size=4)
          'file' => string 'C:\wamp\www\linkshare\vendor\slim\slim\Slim\Route.php' (length=53)
          'line' => int 462
          'function' => string 'call_user_func_array' (length=20)
          'args' => 
            array (size=2)
              ...
      5 => 
        array (size=6)
          'file' => string 'C:\wamp\www\linkshare\vendor\slim\slim\Slim\Slim.php' (length=52)
          'line' => int 1326
          'function' => string 'dispatch' (length=8)
          'class' => string 'Slim\Route' (length=10)
          'type' => string '->' (length=2)
          'args' => 
            array (size=0)
              ...
      6 => 
        array (size=6)
          'file' => string 'C:\wamp\www\linkshare\vendor\slim\slim\Slim\Middleware\Flash.php' (length=64)
          'line' => int 85
          'function' => string 'call' (length=4)
          'class' => string 'Slim\Slim' (length=9)
          'type' => string '->' (length=2)
          'args' => 
            array (size=0)
              ...
      7 => 
        array (size=6)
          'file' => string 'C:\wamp\www\linkshare\vendor\slim\slim\Slim\Middleware\MethodOverride.php' (length=73)
          'line' => int 92
          'function' => string 'call' (length=4)
          'class' => string 'Slim\Middleware\Flash' (length=21)
          'type' => string '->' (length=2)
          'args' => 
            array (size=0)
              ...
      8 => 
        array (size=6)
          'file' => string 'C:\wamp\www\linkshare\vendor\slim\slim\Slim\Middleware\PrettyExceptions.php' (length=75)
          'line' => int 67
          'function' => string 'call' (length=4)
          'class' => string 'Slim\Middleware\MethodOverride' (length=30)
          'type' => string '->' (length=2)
          'args' => 
            array (size=0)
              ...
      9 => 
        array (size=6)
          'file' => string 'C:\wamp\www\linkshare\vendor\slim\slim\Slim\Slim.php' (length=52)
          'line' => int 1271
          'function' => string 'call' (length=4)
          'class' => string 'Slim\Middleware\PrettyExceptions' (length=32)
          'type' => string '->' (length=2)
          'args' => 
            array (size=0)
              ...
      10 => 
        array (size=6)
          'file' => string 'C:\wamp\www\linkshare\index.php' (length=31)
          'line' => int 131
          'function' => string 'run' (length=3)
          'class' => string 'Slim\Slim' (length=9)
          'type' => string '->' (length=2)
          'args' => 
            array (size=0)