diff -r 3079cbf80006 -r 8d688175513a server/src/app/Http/Middleware/Authenticate.php
--- a/server/src/app/Http/Middleware/Authenticate.php	Fri Mar 04 10:08:52 2016 +0100
+++ b/server/src/app/Http/Middleware/Authenticate.php	Fri Mar 04 19:18:28 2016 +0100
@@ -3,42 +3,25 @@
 namespace CorpusParole\Http\Middleware;
 
 use Closure;
-use Illuminate\Contracts\Auth\Guard;
+use Illuminate\Support\Facades\Auth;
 
 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  \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->guest()) {
-            if ($request->ajax()) {
+        if (Auth::guard($guard)->guest()) {
+            if ($request->ajax() || $request->wantsJson()) {
                 return response('Unauthorized.', 401);
             } else {
-                return redirect()->guest('auth/login');
+                return redirect()->guest('login');
             }
         }