Update to Laravel 5.3

[BREAKING] — REMOVES REMOTE API

A new API will need to be implemented properly using the new Laravel
Passport OAuth2 system. DingoAPI was becoming too unstable and
development wasn’t really moving along enough to continue to rely on it.

app/Http/Middleware/RedirectIfAuthenticated.php

@@ -3,38 +3,21 @@
 namespace Pterodactyl\Http\Middleware;
 
 use Closure;
-use Illuminate\Contracts\Auth\Guard;
+use Illuminate\Support\Facades\Auth;
 
 class RedirectIfAuthenticated
 {
-    /**
-     * The Guard implementation.
-     *
-     * @var Guard
-     */
-    protected $auth;
-
-    /**
-     * Create a new filter instance.
-     *
-     * @param  Guard  $auth
-     * @return void
-     */
-    public function __construct(Guard $auth)
-    {
-        $this->auth = $auth;
-    }
-
     /**
      * Handle an incoming request.
      *
      * @param  \Illuminate\Http\Request  $request
      * @param  \Closure  $next
+     * @param  string|null  $guard
      * @return mixed
      */
-    public function handle($request, Closure $next)
+    public function handle($request, Closure $next, $guard = null)
     {
-        if ($this->auth->check()) {
+        if (Auth::guard($guard)->check()) {
             return redirect('/');
         }