Postgres.

models/login.js

@@ -0,0 +1,15 @@
+export default function (sequelize, DataTypes) {
+  const Login = sequelize.define('login', {
+    id: { type: DataTypes.INTEGER, primaryKey: true, autoIncrement: true },
+    successful: { type: DataTypes.BOOLEAN },
+    ip: { type: 'inet' },
+  }, {
+    classMethods: {
+      associate: (models) => {
+        Login.belongsTo(models.user);
+      },
+    },
+  });
+
+  return Login;
+}