If you participated in Streamex ICO or airdrop, you would have STE tokens on your ICO platform account. All ICO tokens migrated to main Streamex exchange along with your account.
All you have to do is use your ICO email account and reset the password for your account. Once you log in you will find STE tokens already in your balance.
Please Update your other account info as well, as first and last name, add the phone number and switch on 2FA verification for extra account security.