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.

i forgot my username and i was looking at the help centre for help and spoiler alert i didnt see andything helpful si i came here in hopes of getting a mincraft personell to help me, sidenote im im tryna change to a mojang account