const user = {
  profile: {
    name: "Marcus",
    score: 0,
    nickname: null,
    bio: undefined,
  },
};

user.profile.nickname ??= "Anonymous";
user.profile.bio ??= "No bio provided";
user.profile.score ??= 100;
user.profile.rank ??= "Beginner";

const { name, score, nickname, bio, rank } = user.profile;
console.log(`${name} | ${score} | ${nickname} | ${bio} | ${rank}`);