specify app callbackUrl or pass redirect_uri parameter for authorizatio...

if no callbackUrl is specify for the consumer app and no redirect_uri is passed as a parameter the server crashes when using express middleware for grant_type=authorization code...

ex: 

curl -X 'GET' 'http://localhost:3000/volos/authorize?grant_type=authorization_code&response_type=code&client_id=5L23v6l2AKaHVG85r%2FHbsFMUkOiEwztY1v4%2BfGzCLik%3D'