Async

Promise

asnyc / await

참고 자료

https://velog.io/@jakeseo_me/%EC%9E%90%EB%B0%94%EC%8A%A4%ED%81%AC%EB%A6%BD%ED%8A%B8-%EA%B0%9C%EB%B0%9C%EC%9E%90%EB%9D%BC%EB%A9%B4-%EC%95%8C%EC%95%84%EC%95%BC-%ED%95%A0-33%EA%B0%80%EC%A7%80-%EA%B0%9C%EB%85%90-26-%EC%9E%90%EB%B0%94%EC%8A%A4%ED%81%AC%EB%A6%BD%ED%8A%B8-Async-Await-2bjygyrlgw