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.
We strongly suggest you delete this tweet, as it contains personal information that can be used to potentially compromise your account. For further assistance, please send us an email at https://help.minecraft.net/hc/en-us/requests/new … and we will assist.