Are you requesting the data correctly? Laravel 4 example

$name = Input::get('name');

laravel 5 example , need use statement:

<?php namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Illuminate\Routing\Controller;

class UserController extends Controller {

   
    public function store(Request $request)
    {
        $name = $request->input('name');

You have

$code = Request::get('code');

Probably need to be

$code = Input::get('code'); //if laravel 4

I checked one by one line code

Error this line

$result = json_decode($githubService->request('user/emails'), true);

CURL active, no problem, and same problem.

I used in example

https://github.com/Lusitanian/PHPoAuthLib/blob/master/examples/github.php

My Controller follow facebook example

public function loginWithFacebook(Request $request)
{
    // get data from request
    $code = $request->get('code');

    // get fb service
    $fb = \OAuth::consumer('Facebook');

    // check if code is valid

    // if code is provided get user data and sign in
    if ( ! is_null($code))
    {
        // This was a callback request from facebook, get the token
        $token = $fb->requestAccessToken($code);

        // Send a request with it
        $result = json_decode($fb->request('/me'), true);

        $message = 'Your unique facebook user id is: ' . $result['id'] . ' and your name is ' . $result['name'];
        echo $message. "<br/>";

        //Var_dump
        //display whole array.
        dd($result);
    }
    // if not ask for permission first
    else
    {
        // get fb authorization
        $url = $fb->getAuthorizationUri();

        // return to facebook login url
        return redirect((string)$url);
    }
}