empty instead of is_null

app/Http/Middleware/HeaderAuth.php

@@ -15,7 +15,7 @@ class HeaderAuth
      */
     public function handle(Request $request, Closure $next): Response
     {
-        if (is_null($request->header('X-BOTAUTH'))) {
+        if (empty($request->header('X-BOTAUTH'))) {
             return response()
                 ->json(["status" => false, "message" => "Unauthorized."], 401);
         }