Mojang Account
•Currently, all Minecraft purchases are attached to a Mojang account.
•You have registered a Mojang account and log into account.mojang.com with your email address.
•After you make your purchase, you can select a Minecraft username and log into the game.
If you created a Minecraft account prior to November, 2012, the following may apply to you:
Mojang Account (migrated from Minecraft account)
•You have migrated your paid Minecraft account to a Mojang account.
•You use your email address to log into Minecraft and Mojang services.
•You no longer log into Minecraft and minecraft.net with a username.
Minecraft account - paid (formerly known as premium)
•You have purchased a copy of Minecraft from Minecraft.net.
•You use your Minecraft username to log into Minecraft services, and can access the full game.
•You can migrate to a Mojang account by visiting account.mojang.com/migrate.
Minecraft account - unpaid
•You have previously registered a Minecraft username, but did not purchase the game.
•You use your Minecraft username to log into Minecraft services, but are unable to use services other than demo mode.
•These accounts were deleted in February, 2015, and the usernames were made available to all, except those accounts that had purchased a gift code.