Account Migration has not begun. There will be an in game message when it's your turn to move. Do not fall for any third party websites that are telling you to migrate NOW. They're trying to steal your information.
Account migration will be taking place in waves - if you don't see a notification in your launcher or profile page, it’s not your turn yet. *If you receive an email about migration, do not give out your information!* Thank you for your patience.