adding user model and necessary basic fields

app/controllers/general/index.js

@@ -1,5 +1,6 @@
 module.exports = {
 	cause: require('./cause.controller'),
 	region: require('./region.controller'),
-	organization: require('./organization.controller')
+	organization: require('./organization.controller'),
+	user: require('./user.controller')
 };

app/controllers/general/user.controller.js

@@ -0,0 +1,31 @@
+const db = require('../../config/db.config.js'),
+	errorMaker = require('../../helpers/error.maker');
+
+const { Grant, Cause, Region, Organization, User } = db;
+
+// POST an email into user general model from given email
+exports.addEmail = (req, res, next) => {
+	User.findAll({
+		where: {
+			email: req.body.email
+		}
+	})
+		.then(users => {
+			if (users.length >= 1) {
+				return next(errorMaker(409, `Email Exists: ${req.body.email}`));
+			} else {
+				User.create({
+					email: req.body.email
+				})
+					.then(donor => {
+						// Send created user to client
+						return res.status(201).json({
+							message: 'User created',
+							donor
+						});
+					})
+					.catch(error => next(error));
+			}
+		})
+		.catch(error => next(error));
+};