Password option should not be displayed on command line usage

[JonnyTech]

When running the program without any arguments, it displays the following text:

$ /opt/hide.me/hide.me

Usage:
  /opt/hide.me/hide.me [options...] <command> [host]

command:
  token - request an Access-Token (required for connect)
  connect - connect to a vpn server
  conf - generate a configuration file to be used with the -c option

host:
  fqdn, short name or an IP address of a hide.me server
  Required when the configuration file does not contain it

options:
  -4	Use IPv4 tunneling only
  -6	Use IPv6 tunneling only
  -P password
    	hide.me password
  -R priority
    	RPDB rule priority (default 10)
  -b filename
    	resolv.conf backup filename (default "/etc/resolv.conf.backup.hide.me")
  -c filename
    	Configuration filename
  -ca string
    	CA certificate bundle (default "CA.pem")
  -d DNS servers
    	comma separated list of DNS servers used for client requests (default "209.250.251.37:53,217.182.206.81:53")
  -dpd duration
    	DPD timeout (default 1m0s)
  -i interface
    	network interface name (default "vpn")
  -k	enable/disable leak protection a.k.a. kill-switch (default true)
  -l port
    	listen port
  -m mark
    	firewall mark for wireguard and hide.me client originated traffic
  -p port
    	remote port (default 432)
  -r table
    	routing table to use (default 55555)
  -s networks
    	comma separated list of networks (CIDRs) for which to bypass the VPN
  -t string
    	access token filename (default "accessToken.txt")
  -u username
    	hide.me username

But password is not available as a command line option

options:
  -P password
    	hide.me password

The only reference that I can find is https://github.com/eventure/hide.client.linux/blob/005c2540ffc27ee9e7b18734d00104f6656a2427/hide.me.go#L31

But I am not well versed in GO to be able to omit that from the command-line usage - maybe removing the backticks is sufficient but I cannot find documentation supporting it.

Anyway, this command-line usage display confused me so it should be removed in case it does so to others.

[leberknecht]

its actually very bad practice to read password from the command line.. it should either come from interactive prompt or be read from env.