How to Change User name

[tuan16x3abkdn]

some airdrop aked me about your username bitcointalk . but i don't know it's name in my pfofile or user ID ? can you tell me , what is this ?

[SuiMikira]

some airdrop aked me about your username bitcointalk . but i don't know it's name in my pfofile or user ID ? can you tell me , what is this ?

For name or username on Bitcointalk, it is the display name. Yours is "tuan16x3abkdn"