Update middleware after upgrade to Laravel 5.2

app/Http/Middleware/Authenticate.php

@@ -1,65 +1,33 @@
-<?php namespace FireflyIII\Http\Middleware;
+<?php
+
+namespace FireflyIII\Http\Middleware;
 
 use App;
-use Auth;
 use Carbon\Carbon;
 use Closure;
-use FireflyIII\User;
-use Illuminate\Contracts\Auth\Guard;
-use Illuminate\Http\Request;
+use Illuminate\Support\Facades\Auth;
 use Preferences;
 
-/**
- * Class Authenticate
- *
- * @codeCoverageIgnore
- * @package FireflyIII\Http\Middleware
- */
 class Authenticate
 {
-
-    /**
-     * The Guard implementation.
-     *
-     * @var Guard
-     */
-    protected $auth;
-
-    /**
-     * Create a new filter instance.
-     *
-     * @param  Guard $auth
-     *
-     */
-    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 $request, Closure $next)
+    public function handle($request, Closure $next, $guard = null)
     {
-
-        if ($this->auth->guest()) {
+        if (Auth::guard($guard)->guest()) {
             if ($request->ajax()) {
                 return response('Unauthorized.', 401);
             } else {
-                return redirect()->guest('auth/login');
-            }
-        }
-        /** @var User $user */
-        $user = $this->auth->user();
-        if ($user instanceof User && intval($user->blocked) == 1) {
-            Auth::logout();
 
-            return redirect()->route('index');
+                return redirect()->guest('login');
+            }
         }
 
         // if logged in, set user language:
@@ -72,7 +40,7 @@ class Authenticate
         setlocale(LC_TIME, $locale);
         setlocale(LC_MONETARY, $locale);
 
+
         return $next($request);
     }
-
 }