Update to support optional email register and signin

lib/migrations/20161201050312-support-email-signin.js

@@ -0,0 +1,13 @@
+'use strict';
+
+module.exports = {
+  up: function (queryInterface, Sequelize) {
+    queryInterface.addColumn('Users', 'email', Sequelize.TEXT);
+    queryInterface.addColumn('Users', 'password', Sequelize.TEXT);
+  },
+
+  down: function (queryInterface, Sequelize) {
+    queryInterface.removeColumn('Users', 'email', Sequelize.TEXT);
+    queryInterface.removeColumn('Users', 'password', Sequelize.TEXT);
+  }
+};