So what about the Reference stated in your profile in 2016.

https://bitcointalk.org/index.php?topic=996318.msg16203575#msg16203575

On your profile it says "account @ mill0601 has been sold".
If it is true that the account was sold, it is clear that you can no longer log into your old account, which was held by someone else.

What about all that, is it true that you have sold, after that you now want to claim your account again, many cases like this that I have encountered, If it's true the account: @mill0601 you are the owner, you can definitely enter it, if it doesn't involve a third party, it's sold/hacked.

And whose address is this: 15d4cdy9TgUyLstnVf7MDDaPK5tM6UepKH.