Please open in browser: https://accounts.google.com/o/oauth2/auth?response_type=code&access_type=offline&client_id=624099077812-j15osmhf3bj5i6dbliv3keo8n3bte17d.apps.googleusercontent.com&redirect_uri=https%3A%2F%2Fwww.teriflix.com&state&scope=https%3A%2F%2Fwww.googleapis.com%2Fauth%2Fcalendar%20https%3A%2F%2Fwww.googleapis.com%2Fauth%2Fcontacts&approval_prompt=auto. And save verification code in /srv/www.teriflix.com/teriflix_social/wordpress/google_calendar/website/auth_code.txt