refactor: DiscodeitApplication의 AuthService 부분 수정

- id 제거

Author: barrackkk

src/main/java/com/sprint/mission/discodeit/DiscodeitApplication.java

@@ -64,7 +64,6 @@ public static void main(String[] args) {
 
         System.out.println("\n====== 유저 로그인 테스트 ======");
         AuthLoginRequest loginRequest = AuthLoginRequest.builder()
-                .id(user1.getId())
                 .userName(user1CreateRequest.username())
                 .password(user1CreateRequest.password())
                 .build();