Cisco AnyConnect Secure Mobility Client on MacOS autofill password and connect (apple script) (version 2.0)

vpn_run.scpt

-- 
-- Yaroslav Fedorov <Y.Fedorov@reg40.net>
--   11/14/2016
--  URL (http://indy-world.net/2016/11/cisco-anyconnect-secure-mobility-client-on-macos-autofill-password-and-connect-apple-script-version-2-0/) 

set userLoginName to "<<user_login>>"
set keychainRecordName to "cisco_any_connect_auth"
set serverUri to "vpn.company.com"

on getPassword(keychainItemName)
	local password
	set password to do shell script ("/usr/bin/security 2>&1 >/dev/null find-generic-password -gl " & quoted form of keychainItemName & " | cut -c 11-99 | sed 's/\"//g'")
	if password contains "could not be found in the keychain" or password as string is equal to "" then
		display alert "Password not found in the keychain" message "Certain tasks in this script need the administrator password to work.
You must create a new password in the OS X Keychain with a custom name, and set it with your administrator password, then edit this script." as critical
		error "Password could not be found in the keychain."
	else
		return password
	end if
end getPassword

set ciscoClientMainWindowName to "Cisco AnyConnect Secure Mobility Client"

activate application ciscoClientMainWindowName
tell application "System Events"
	repeat until window 1 of process ciscoClientMainWindowName exists
	end repeat
	
	tell process ciscoClientMainWindowName
		
		set disconnectButtonTitle to "Disconnect"
		if exists (button disconnectButtonTitle of window 1) then
			set result to display dialog "VPN is already connected." buttons {"Reconnect", "Cancel"} default button 2
			tell window 1
				click button disconnectButtonTitle
			end tell
		end if
		
		repeat until static text "Ready to connect." of window 1 exists
		end repeat
		
		tell window 1
			tell combo box 1
				set focused to 1
				set value to serverUri
			end tell
			
			click button "Connect"
		end tell
		set ciscoWindowTitle to "Cisco AnyConnect | " & serverUri
		repeat until window ciscoWindowTitle exists
		end repeat
		
		tell window ciscoWindowTitle
			tell text field 1
				set value to userLoginName
			end tell
			
			tell text field 2
				set value to my getPassword(keychainRecordName)
			end tell
			click button "OK"
		end tell
	end tell
end tell

how to implement this?