Down unreachable node by HTTP

Hello, everyone. It is my first time when I am messaging here. Please forgive me if I am doing something wrong =)
I have a silly question because the current documentation did not help me.
I tried to down the unreachable node by http endpoint according to the page ( https://doc.akka.io/docs/akka-management/current/cluster-http-management.html#api-definition ).
The current cluster state is the next:

Request:

curl 10.1.0.124:8558/cluster/members/

Response:

{"leader":"akka://application@10.1.0.124:25520","members":[{"node":"akka://application@10.1.0.124:25520","nodeUid":"-7768515516228898368","roles":["dc-default"],"status":"Up"},{"node":"akka://application@10.1.0.133:25520","nodeUid":"2194424415667308056","roles":["dc-default"],"status":"Up"}],"oldest":"akka://application@10.1.0.124:25520","oldestPerRole":{"dc-default":"akka://application@10.1.0.124:25520"},"selfNode":"akka://application@10.1.0.124:25520","unreachable":[{"node":"akka://application@10.1.0.133:25520","observedBy":["akka://application@10.1.0.124:25520"]}]}

I tried to down the unreachable node and received the error.

Request:

curl 10.1.0.124:8558/cluster/members/application@10.1.0.133:25520 -X PUT -d 'operation=DOWN'

Response

A request was made of a resource using a request method not supported by that resource;

Out of the box management does not allow operations that change the cluster, see https://doc.akka.io/docs/akka-management/current/akka-management.html#read-only-routes

Make sure you configure HTTPS and some form of authentication for a production environment where you enable other routes than the read-only ones.

Thank you. It works. I did not notice the lines before API description.