UIN (Unique Identifier) is a unique positive integer associated with a MyChat user account. You don't need to remember it as this number is generated by the server database when a new user is created (auto-incrementing). It never repeats, even if the account is deleted (there's no concept of reuse).


This number's uniqueness is necessary to ensure the integrity of the MyChat databases.


MyChat also has a special UIN = 0, which is assigned to the built-in Elisa bot. This bot can be used to send messages, perform various administrative operations, and run server scripts.


You can view all UINs in the server Admin panel, in the "Users" section.