@MojangSupport I migrated my account and now all my worlds are gone. How can we fix this? 
For technical help, please visit our Help site https://msft.it/6010nCQV2 .
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
For technical help, please visit our Help site https://msft.it/6010nCQV2 .