create a middleware and add it in the password controller

I can't use the default middleware?

<?php

namespace App\Http\Middleware;

use Closure;
use Illuminate\Support\Facades\Auth;

class Authenticate
{
     /**
      * Handle an incoming request.
      *
      * @param  \Illuminate\Http\Request  $request
      * @param  \Closure  $next
      * @param  string|null  $guard
      * @return mixed
      */
     public function handle($request, Closure $next, $guard = null)
     {
        if (Auth::guard($guard)->guest()) {
            if ($request->ajax() || $request->wantsJson()) {
                return response('Unauthorized.', 401);
            } else {
                 return redirect()->guest('login');
            }
         }
         return $next($request);
     }
 }