Require guzzle to make the call to github endpoint.

CollectorController.php

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use GuzzleHttp\Exception\GuzzleException;
use GuzzleHttp\Client;

class CollectorController extends Controller
{
    /**
     * Display a listing of the resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function index($username)
    {
        $client = new Client(); //GuzzleHttp\Client
        $result = $client->get('https://api.github.com/users/'.$username.'/events/public');
        $collection =  collect(json_decode($result->getBody()),true)->pluck('type');
        $total = 0;
        foreach($collection as $item){
            if($item == 'PushEvent'){
                $total += 10;}
            elseif ($item == 'PullRequestEvent') {
                $total += 5;}
            elseif ($item == 'IssueCommentEvent') {
                 $total += 4;}
            else {
                  $total += 1;}
        }
    return $total;
    }
}

Web.php

<?php

/*
|--------------------------------------------------------------------------
| Web Routes
|--------------------------------------------------------------------------
|
| Here is where you can register web routes for your application. These
| routes are loaded by the RouteServiceProvider within a group which
| contains the "web" middleware group. Now create something great!
|
*/

Route::get('/', function () {
    return view('welcome');
});

Route::get('collect/{username}', 'CollectorController@index');