Pegar dados de usuario Github - app Android

Mobile Android
,
#1

Preciso de uma ajuda para concluit meu app que buscas os dados do usuario github atraves do Id.
Segue o status atua da minha main activity:

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Button searchButton = (Button) findViewById(R.id.search_button);
    final EditText searchProfile = (EditText) findViewById(R.id.search_profile);

    searchButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            fillProfileInfo(searchProfile.getText().toString());
        }
    });
}

void fillProfileInfo(String profile) {
    String requestUrl = "https://api.github.com/users/" + profile;

    OkHttpClient client = new OkHttpClient();
    Request request = new Request.Builder()
            .get()
            .url(requestUrl)
            .build();

    Call call = client.newCall(request);

    call.enqueue(new Callback() {
        @Override
        public void onFailure(Call call, IOException e) {
            Log.i("getProfileInfo", "FAIL");
        }

        @Override
        public void onResponse(Call call, Response response) throws IOException {
            final String jsonData = response.body().string();
            Log.i("getProfileInfo", jsonData);
            if (response.isSuccessful()) {
                CardView userCard = (CardView) findViewById(R.id.card_user_info);
                try {
                    JSONObject rootObj = new JSONObject(jsonData);

                    TextView userName = (TextView) findViewById(R.id.user_name);
                    TextView userBio = (TextView) findViewById(R.id.user_bio);
                    TextView userFollowers = (TextView) findViewById(R.id.user_folowers);
                    TextView userRepos = (TextView) findViewById(R.id.user_repos);
                    ImageView userAvatar = (ImageView) findViewById((R.id.user_avatar));

                    userName.setText(rootObj.getString("login"));
                    userBio.setText(rootObj.getString("bio"));
                    userFollowers.setText(rootObj.getInt("followers") + " Seguidores");
                    userRepos.setText(rootObj.getInt("public_repos") + " Repositórios");

                    try {
                        Glide.with(MainActivity.this).load(rootObj.getString("avatar_url"))
                                .asBitmap()
                                .fitCenter()
                                .into(userAvatar);
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                    userCard.setVisibility(View.VISIBLE);

                    fillRepoInfo();
                } catch (JSONException e) {
                    userCard.setVisibility(View.GONE);
                }
            }
        }
    });
}

void fillRepoInfo() {
    return;
}

}