Use the Authenticate middleware from core

app/Http/Kernel.php

@@ -46,7 +46,7 @@ class Kernel extends HttpKernel
      * @var array
      */
     protected $routeMiddleware = [
-        'auth' => \App\Http\Middleware\Authenticate::class,
+        'auth' => \Illuminate\Http\Middleware\Authenticate::class,
         'auth.basic' => \Illuminate\Auth\Middleware\AuthenticateWithBasicAuth::class,
         'bindings' => \Illuminate\Routing\Middleware\SubstituteBindings::class,
         'can' => \Illuminate\Foundation\Http\Middleware\Authorize::class,

app/Http/Middleware/Authenticate.php

-<?php
-
-namespace App\Http\Middleware;
-
-use Closure;
-use Illuminate\Support\Facades\Auth;
-use Illuminate\Auth\AuthenticationException;
-
-class Authenticate
-{
-    /**
-     * Handle an incoming request.
-     *
-     * @param  \Illuminate\Http\Request  $request
-     * @param  \Closure  $next
-     * @param  string  ...$guards
-     * @return mixed
-     *
-     * @throws \Illuminate\Auth\AuthenticationException
-     */
-    public function handle($request, Closure $next, ...$guards)
-    {
-        $this->authenticate($guards);
-
-        return $next($request);
-    }
-
-    /**
-     * Determine if the user is logged in to any of the given guards.
-     *
-     * @param  array  $guards
-     * @return void
-     *
-     * @throws \Illuminate\Auth\AuthenticationException
-     */
-    protected function authenticate(array $guards)
-    {
-        if (count($guards) <= 1) {
-            Auth::guard(array_first($guards))->authenticate();
-
-            return Auth::shouldUse($guard);
-        }
-
-        foreach ($guards as $guard) {
-            if (Auth::guard($guard)->check()) {
-                return Auth::shouldUse($guard);
-            }
-        }
-
-        throw new AuthenticationException;
-    }
-}