/**
* Set up an OAuth2 Authorization Server.
*/
protected function setAuthorizationServer()
{
$this->authorisationServer = new AuthorizationServer();
// Storage
$this->authorisationServer->setSessionStorage(new Storage\SessionStorage());
$this->authorisationServer->setAccessTokenStorage(new Storage\AccessTokenStorage());
$this->authorisationServer->setClientStorage(new Storage\ClientStorage());
$this->authorisationServer->setScopeStorage(new Storage\ScopeStorage());
$this->authorisationServer->setRefreshTokenStorage(new Storage\RefreshTokenStorage());
// Grants
$this->authorisationServer->addGrantType(new RefreshTokenGrant());
// Events
$this->authorisationServer->addEventListener('error.auth.client', [$this, 'eventErrorAuthClient']);
$this->authorisationServer->addEventListener('error.auth.user', [$this, 'eventErrorAuthUser']);
$this->authorisationServer->addEventListener('session.owner', [$this, 'eventSessionOwner']);
}