🚧 refactoring is ongoing

models/index.js

@@ -0,0 +1,24 @@
+const User = require('./user');
+const Message = require('./message');
+const sequelize = require('../common/database');
+
+Message.belongsTo(User);
+
+(async () => {
+  await sequelize.sync({ alter: true });
+  console.log('Database initialized.');
+  const isNoAdminExisted =
+    (await User.findOne({ where: { isAdmin: true } })) === null;
+  if (isNoAdminExisted) {
+    console.log('No admin user existed! Creating one for you.');
+    await User.create({
+      username: 'admin',
+      password: '123456',
+      isAdmin: true,
+      prefix: 'admin',
+    });
+  }
+})();
+
+exports.User = User;
+exports.Message = Message;