使用Sequilize和async/await以正确的顺序在Node.js中查找/创建记录

const Sequelize = require('sequelize');
const sequelize = new Sequelize('database', 'username', 'password', {
  host: 'localhost',
  dialect: 'mysql',
});

const User = sequelize.define('User', {
  username: Sequelize.STRING,
  email: Sequelize.STRING,
});

async function findOrCreateUser(username, email) {
  try {
    let user = await User.findOne({ where: { username } });
    if (!user) {
      user = await User.create({ username, email });
    }
    return user;
  } catch (error) {
    console.error('Error finding/creating user:', error);
    throw error;
  }
}

findOrCreateUser('john', 'john@example.com')
  .then(user => {
    console.log('User found/created:', user);
  })
  .catch(error => {
    console.error('Error finding/creating user:', error);
  });