codigo actual del servidor, con avances de joan

app/Http/Middleware/IsSeller.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace App\Http\Middleware;
+
+use Closure;
+use Auth;
+
+class IsSeller
+{
+    /**
+     * Handle an incoming request.
+     *
+     * @param  \Illuminate\Http\Request  $request
+     * @param  \Closure  $next
+     * @return mixed
+     */
+    public function handle($request, Closure $next)
+    {
+        if (Auth::check() && Auth::user()->user_type == 'seller'  && !Auth::user()->banned) {
+            return $next($request);
+        }
+        else{
+            abort(404);
+        }
+    }
+}