@Type(() => User)
readonly user: User;
์์ ์ฝ๋๋ฅผ ์์ฑํ๋๋ ์๋ ์ค๋ฅ๊ฐ ๋ฌ๋ค.
"User" only refers to a type, but is being used a value here
class-transformer ๊ณต์ ๋ฌธ์๋ฅผ ์ฐพ์๋ณด๋ @Type ๋ด์ ์์ฑํ๋ type ์ interface ๊ฐ ์๋ class ๋ฅผ ์ฌ์ฉํ๋ผ๊ณ ๋์ด ์์๋ค.
User interface ๋ฅผ User class ๋ก ๋ง๋ค๋ฉด ํด๊ฒฐ!
๋ฐ์ํ