npx sequelize-cli model:generate --name user --attributes email:string,password:string,username:string, mobile:string
user 모델에는 email, password, username, mobile 필드들이 포함되어야 합니다.
https://www.youtube.com/watch?v=7nafaH9SddU
REST API가 뭐야???
https://www.youtube.com/watch?v=SLwpqD8n3d0
https://www.youtube.com/watch?v=pKd0Rpw7O48
express-session