Accessing netPI web UI with REST API

[tad]

Dear Armin,

I can shut down netPI by executing the following 2 commands.
I am now planning to execute them from a Python program which is triggered from Node-RED dashboard.

http --verify=no --session=logged-in --json POST "https://<IP address>/login"  username=<username> password=<password>
http --verify=no --session=logged-in --json POST "https://<IP address>/system" argument=shutdown

But, the following response will come.
'System will shutdown after 10 seconds'

Just in case, I would like to ask you that: is it possible to shutdown netPI immediately without 10 seconds delay?

Thank you very much for your information.
Best regards,