我正在expressjs中开发一个register函数，但由于某种原因，返回了以下消息：

TypeError: Cannot read properties of undefined (reading 'id')

这是我的模型：Users.ts

interface UserAttributes {
  id: number;
  first_name: string;
  last_name: string;
  password: string;
  email:string;
  token: string;
  description?: string;
  createdAt?: Date;
  updatedAt?: Date;
  deletedAt?: Date;
}

'use strict';
const {
  Model, Optional
} = require('sequelize');
module.exports = (sequelize, DataTypes) => {
   class Users extends Model<UserAttributes> {
    public id!: number;
    public first_name!: string;
    public last_name!:string;
    public email!: string;
    public password!: string;
    public token!: string;

  // timestamps!
    public readonly createdAt!: Date;
    public readonly updatedAt!: Date;
    public readonly deletedAt!: Date;

    static associate(models) {
      // define association here
    }
  }
  Users.init({
    id: {
      type:DataTypes.INTEGER,
      primaryKey:true
    },
    password: DataTypes.STRING,
    firstName: DataTypes.STRING,
    lastName: DataTypes.STRING,
    token: DataTypes.STRING,
  }, {
    sequelize,
    modelName: 'Users',
    tableName:'users',
  });
  return Users;
};

这是寄存器控制器：

async function Register (req:Request, res:Response): Promise<Response> {
  try {
    const {id, first_name, last_name, email, password, token} = req.body;
    await Users.find(email);
    const encrypt: typeof Users = await bcrypt.hash(password, 10);
    const user: typeof Users  = await Users.create({first_name, last_name, email: email.toLowerCase(), password: encrypt});
    const Token: typeof Users = await jwt.sign({user_id: user.id?.toString(), email:user.email}, process.env.TOKEN_SECRET);
    user.token = Token;
    return res.status(200).json(user);
  } catch (error) {
    console.error('User couldnt be registered', error);
  }
};

错误消息如下：TypeError: Cannot read properties of undefined (reading 'id')
如果有人能告诉我代码出了什么问题，我会非常感激的。
谢谢祝你今天愉快。