old_contents: require('../src/services/user/model');
  
  module.exports = {
  	up: async function up() {
  		// Make changes to the database here.
  		// Hint: Access models via this('modelName'), not the imported model to have
  		// access to the correct database connection. Otherwise Mongoose calls never return.
  		await this('user').findOneAndUpdate({
  			firstName: 'Marla',
  			lastName: 'Mathe',
  		}, {
  			firstName: 'Max',
  		}).lean().exec();
  	},
  
  	down: async function down() {
  		// Implement the necessary steps to roll back the migration here.
  		await this('user').findOneAndUpdate({
  			firstName: 'Max',
  			lastName: 'Mathe',
  		}, {
  			firstName: 'Marla',
  		}).lean().exec();
  	},
  };
  
new_contents: const mongoose = require('mongoose');
  
  mongoose.model('user', new mongoose.Schema({
  	firstName: { type: String, required: true },
  	lastName: { type: String, required: true },
  }, {
  	timestamps: true,
  }));
  
  module.exports = {
  	up: async function up() {
  		// Make changes to the database here.
  		// Hint: Access models via this('modelName'), not an imported model to have
  		// access to the correct database connection. Otherwise Mongoose calls never return.
  		await this('user').findOneAndUpdate({
  			firstName: 'Marla',
  			lastName: 'Mathe',
  		}, {
  			firstName: 'Max',
  		}).lean().exec();
  	},
  
  	down: async function down() {
  		// Implement the necessary steps to roll back the migration here.
  		await this('user').findOneAndUpdate({
  			firstName: 'Max',
  			lastName: 'Mathe',
  		}, {
  			firstName: 'Marla',
  		}).lean().exec();
  	},
  };
  
subject: Use inline schema in template