Initial revision

app/Http/Controllers/Controller.php

@@ -0,0 +1,10 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use Laravel\Lumen\Routing\Controller as BaseController;
+
+class Controller extends BaseController
+{
+    //
+}

app/Http/Controllers/ExampleController.php

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+<?php
+
+namespace App\Http\Controllers;
+
+class ExampleController extends Controller
+{
+    /**
+     * Create a new controller instance.
+     *
+     * @return void
+     */
+    public function __construct()
+    {
+        //
+    }
+
+    //
+}

app/Http/Middleware/Authenticate.php

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+<?php
+
+namespace App\Http\Middleware;
+
+use Closure;
+use Illuminate\Contracts\Auth\Factory as Auth;
+
+class Authenticate
+{
+    /**
+     * The authentication guard factory instance.
+     *
+     * @var \Illuminate\Contracts\Auth\Factory
+     */
+    protected $auth;
+
+    /**
+     * Create a new middleware instance.
+     *
+     * @param  \Illuminate\Contracts\Auth\Factory  $auth
+     * @return void
+     */
+    public function __construct(Auth $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, $guard = null)
+    {
+        if ($this->auth->guard($guard)->guest()) {
+            return response('Unauthorized.', 401);
+        }
+
+        return $next($request);
+    }
+}

app/Http/Middleware/ExampleMiddleware.php

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+<?php
+
+namespace App\Http\Middleware;
+
+use Closure;
+
+class ExampleMiddleware
+{
+    /**
+     * Handle an incoming request.
+     *
+     * @param  \Illuminate\Http\Request  $request
+     * @param  \Closure  $next
+     * @return mixed
+     */
+    public function handle($request, Closure $next)
+    {
+        return $next($request);
+    }
+}