I try to write a Api using express and sequelize. I'm writing create user function and use bcrypt to hash password.

 const createNewUser = (data) => {
  return new Promise(async (resolve, reject) => {
    try {
      let check = await checkUserEmail(data.email)
      if (check === true) {
        resolve({
          errcode: 1,
          errMessage: 'Your email is already exist!',
        })
      }
      let hashPassWordFromBcrypt = await hashUserPassWord(data.passWord)
  

      await db.User.create({
        email: data.email,
        passWord: hashPassWordFromBcrypt,
        firstName: data.firstName,
        lastName: data.lastName,
        address: data.address,
        phoneNumber: data.phoneNumber,
        gender: data.gender === '1' ? true : false,
        roleId: data.roleId,
      })
     resolve({
       errcode: 0,
       errMessage: 'OK',
     })
} catch (error) {
  reject(error)
}

}) }

const salt = bcrypt.genSaltSync(10)

const hashUserPassWord = (password) => {
  return new Promise(async (resolve, reject) => {
    try {
      let hashPassWord = await bcrypt.hashSync(password, salt)
      resolve(hashPassWord)
    } catch (error) {
      reject(error)
    }
  })
}

const checkUserEmail = (email) => {
  return new Promise(async (resolve, reject) => {
    try {
      const user = await db.User.findOne({ where: { email } })
      if (user) {
        resolve(true)
      }
      resolve(false)
    } catch (e) {
      reject(e)
    }
  })
}

I use postman to test. The problem is when I send data with a email already exist.The response: errCode: 1 and errMasege: Your email is already exist but a new user created with same email. But if I post a request with a already exist email and without passWord, no new User created. Help me. Thanks.