update,

tsc1877/task1/project/admin/db_seed/helloworld.js

@@ -0,0 +1,32 @@
+const { Sequelize, DataTypes } = require('sequelize');
+const { sequelize } = require('./model');
+
+const User = sequelize.define(
+  'User',
+  {
+    id: { type: DataTypes.INTEGER, primaryKey: true, autoIncrement: true, unique: true },
+    firstName: { type: DataTypes.STRING, allowNull: false },
+    lastName: { type: DataTypes.STRING, allowNull: false },
+  },
+  { timestamps: false },
+);
+
+(async () => {
+  try {
+    await sequelize.authenticate();
+    console.log('Connection has been established successfully.');
+
+    // create table
+    await sequelize.sync();
+
+    let users = await User.findAll({ attributes: ['firstName'] });
+    User.destroy({ truncate: true, cascade: true, force: true });
+
+    const user = await User.create({ firstName: 'John', lastName: 'Doe' });
+    users = await User.findAll();
+
+    // await sequelize.close();
+  } catch (error) {
+    console.error('Unable to connect to the database:', error);
+  }
+})();