用sequelize在nodejs中创建“动态查询”？

const Sequelize = require('sequelize');
const sequelize = new Sequelize('database', 'username', 'password', {
  host: 'localhost',
  dialect: 'mysql' // 或者其他数据库类型，如postgres、sqlite等
});

const User = sequelize.define('user', {
  firstName: Sequelize.STRING,
  lastName: Sequelize.STRING
});

// 查询所有用户
User.findAll().then(users => {
  console.log(users);
});

// 根据条件查询用户
User.findAll({
  where: {
    firstName: 'John'
  }
}).then(users => {
  console.log(users);
});

// 动态查询
const dynamicQuery = {
  where: {
    firstName: 'John',
    lastName: 'Doe'
  },
  order: [['createdAt', 'DESC']],
  limit: 10
};

User.findAll(dynamicQuery).then(users => {
  console.log(users);
});