const User = {
  email:String,
  password: String,
  picture: String,
  profile: {
    name: String,
    job: String,
    company: String,
  },
  history:[{
    projectName:String,
    date: Date,
    paid: Number //付錢
  }],
}

const bcrypt = User.pre('save', (password) => {
  //compare password
})

const getAvatar = User.pre('save',(picture)=>{
  //getAvatar
})