text: 'use strict';
  module.exports = (sequelize, DataTypes) => {
    const message = sequelize.define('message', {
      sender_id: DataTypes.INTEGER,
      content: DataTypes.STRING,
      is_file: DataTypes.BOOLEAN,
      conversation_id: DataTypes.INTEGER
    }, {});
    message.associate = function(models) {
      // associations can be defined here
    };
    return message;
  };