Lexeme: user id  
Rare (0.16)
Definition:
  1. abbreviation. A user ID, or username, is a unique string of characters used to identify a user on a computer system, website, or application. It is often required along with a password to authenticate a user and grant access to certain features or information. User IDs help differentiate between multiple users and ensure the security and privacy of individual accounts. GPT3.5
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