sequelize v5版本使用create或者findOrCreate添加数据时，传过去的值都是undefined

模型定义

const Sequelize = require('sequelize');
const BaseModel = require('./BaseModel');
const sequelize = require('../lib/HealthCheck').getCheckInstance().getMysqlConnection(); //获取最下面定义的sequelize连接
class UserModel extends BaseModel {
    constructor() {
        super();
    }
    async addNewUser(params) {//params是传过来的参数，主要是要添加的字段值，类型是Object
        let addRuesult = await UserModel.findOrCreate({
            where: {username: params.username},
            defaults: {password: params.password, nickname: params.nickname, region: params.region, status: 11}
        });

        return addRuesult;
    }
}

//用户表模型定义
UserModel.init({
    id: {type: Sequelize.UUID, defaultValue: Sequelize.UUIDV1, allowNull: false, primaryKey: true},
    username: {type: Sequelize.STRING, allowNull: false},
    password: {type: Sequelize.STRING, allowNull: false},
    nickname: Sequelize.STRING,
    region: Sequelize.STRING,
    status: {type: Sequelize.INTEGER(2), allowNull: false},
    created_time: {type: Sequelize.DATE, allowNull: false},
    last_login_time: Sequelize.DATE
}, {
    sequelize,
    modelName: 'user',
    timestamps: true,
    createdAt: 'created_time',
    updatedAt: 'last_login_time',
    deletedAt: false
});

module.exports = UserModel;

BaseModel定义

const Sequelize = require('sequelize');
const Model = Sequelize.Model;

class BaseModel extends Model{
    constructor() {
        super();
    }
}

module.exports = BaseModel;

数据库连接定义

 let sequelize = new Sequelize({
 	host: '127.0.0.1',
        port: 3306,
        username: 'root',
        password: '123456',
        database: 'service',
        dialect: 'mysql',
        define: {
            freezeTableName: true
        }
 });

问题 模型定义由于有做字段值非空验证，结果sequelize会报验证非空错误，传过来的参数都是能正确获取到的，就是调用create或者findOrCreate方法时无法获取到字段值；我有试过在调用sequelize的方法时，直接将字段值写死，还是会报一样的错；大神们帮我看看到底是我定义错了，还是哪个地方出了问题？谢谢！