Code QuizAdvanced

Uncapitalize a class name

Lowercasing only the first character of a type name with the right intrinsic.

Codetypescript
type ClassName = "UserService" | "AuthService";

// Goal: "userService" | "authService"
type InstanceName = Lowercase<ClassName>;

const i: InstanceName = "userService"; // error!

What is the bug in this code?