Upgrade to Laravel 5.8 and AdminLTE3

app/Http/Middleware/Authenticate.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace App\Http\Middleware;
+
+use Illuminate\Auth\Middleware\Authenticate as Middleware;
+
+class Authenticate extends Middleware
+{
+    /**
+     * Get the path the user should be redirected to when they are not authenticated.
+     *
+     * @param  \Illuminate\Http\Request  $request
+     * @return string
+     */
+    protected function redirectTo($request)
+    {
+        if (! $request->expectsJson()) {
+            return route('login');
+        }
+    }
+}

app/Http/Middleware/CheckForMaintenanceMode.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace App\Http\Middleware;
+
+use Illuminate\Foundation\Http\Middleware\CheckForMaintenanceMode as Middleware;
+
+class CheckForMaintenanceMode extends Middleware
+{
+    /**
+     * The URIs that should be reachable while maintenance mode is enabled.
+     *
+     * @var array
+     */
+    protected $except = [
+        //
+    ];
+}

app/Http/Middleware/TrustProxies.php

@@ -17,7 +17,7 @@ class TrustProxies extends Middleware
     /**
      * The headers that should be used to detect proxies.
      *
-     * @var string
+     * @var int
      */
     protected $headers = Request::HEADER_X_FORWARDED_ALL;
 }

app/Http/Middleware/VerifyCsrfToken.php

@@ -6,6 +6,13 @@ use Illuminate\Foundation\Http\Middleware\VerifyCsrfToken as Middleware;
 
 class VerifyCsrfToken extends Middleware
 {
+    /**
+     * Indicates whether the XSRF-TOKEN cookie should be set on the response.
+     *
+     * @var bool
+     */
+    protected $addHttpCookie = true;
+
     /**
      * The URIs that should be excluded from CSRF verification.
      *