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Username
01
ユーザー名
a unique identifier or name chosen by a user to represent themselves or their account in online platforms, websites, or social media
例
His username is a combination of his initials and birth year.
Your username will be your email address.
She chose a unique username for her online account.
The username must be entered in lowercase to be accepted by the system.
I'm going to mention your username in my Instagram caption to give you credit for the photo.
