users.model.js

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

module.exports = function (app) {
  const sequelizeClient = app.get('sequelizeClient');
  const users = sequelizeClient.define('users', {

    email: {
      type: DataTypes.STRING,
      allowNull: false,
      unique: true
    },
    password: {
      type: DataTypes.STRING,
      allowNull: false
    },
  }, {
    hooks: {
      beforeCount(options) {
        options.raw = true;
      }
    }
  });
  users.associate = function (models) {
    const { comments, posts } = models;
    users.hasMany(comments); // Will add userId to comments model
    users.hasMany(posts); // Will add userId to posts model
  };
  return users;
};