title: How to connect to hidden wifi network using nmcli
body: <p>I have to write a linux desktop software which connects to a hidden wifi network. 
  If the network is not hidden, my code can connect by calling nmcli, but if it is hidden, it can not add the connection. However, I can create a new network using the GUI of the Network Manager, so I think it is not impossible. Do you have any ideas?</p>