If you are a Java Minecraft player and haven’t heard about or gotten your migration notice yet, it’s time to get moving! At some point, the legacy Java accounts (via Mojang) will no longer be usable, you will need to go through the account migration process. Questions about migration – here is a link to the Java Migration Help from Minecraft.net
Spread the word and make sure to open your launcher regularly to see if you’ve been selected for migration.