also: ユーザめい
noun
Computing term for a unique identifier used to log into a system or service.
新しいアカウントを作成するには、ユーザー名とパスワードを入力してください。
To create a new account, please enter a username and password.
An account is the overall user profile, while a username is the identifier within that account.
Loanword from English 'user name', adapted into katakana with the long vowel marker optional.