Why doesn't Apache Oltu Instragram integration return access_token

Question

I am developing a Spring MVC + Apache Oltu + Instagram example. In this example I created an App on https://www.instagram.com/developer/ and I got the

Answer 1

After lots of trial and error method, I was able to resolve this issue:

While making request for the access token I should be using the below:

OAuthClientRequest request = OAuthClientRequest
                .authorizationLocation(AUTHORIZATION_URL)
                .setClientId(CLIENT_ID)
                .setRedirectURI(REDIRECT_URL)
                .setResponseType(ResponseType.CODE.toString())
                .setScope("public_content follower_list comments relationships likes basic")
                .buildQueryMessage();

and with the subsequent request I will be using the below:

OAuthClientRequest request = OAuthClientRequest
                //.authorizationProvider(OAuthProviderType.INSTAGRAM)
                .tokenLocation(ACCESS_TOKEN_URL)
                .setGrantType(GrantType.AUTHORIZATION_CODE)
                .setClientId(CLIENT_ID)
                .setClientSecret(CLIENT_SECRET)
                .setRedirectURI(REDIRECT_URL)
                .setCode(authorizationCode)
                .buildBodyMessage(); 

and this gives me the solid Response:

{"data": {"id": "3159574895", "username": "Raj", "profile_picture": "https://scontent.cdninstagram.com/t51.2885-19/s150x150/19367511_329283184160313_6318737005198966784_a.jpg", "full_name": "Raj", "bio": "Wish me on 25th-Dec\nLove to code !! \nEngineer by my choice !!\nLove to drive !! \ud83d\ude0b\ud83d\ude0a", "website": "", "is_business": false, "counts": {"media": 14, "follows": 18, "followed_by": 51}}, "meta": {"code": 200}}

After more google found : OAuthProblem, missing parameter access_token