properly making add email from landing page work

app/controllers/user.controller.js

@@ -1,28 +1,54 @@
 const db = require('../../models'),
 	errorMaker = require('../helpers/error.maker');
 
-const { Grant, Cause, Region, Organization, User } = db;
+const { Grant, Cause, Region, Organization, User, sequelize } = 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(donor);
-					})
-					.catch(error => next(error));
+exports.addEmail = async (req, res, next) => {
+	try {
+		const { email } = req.body;
+
+		const users = await sequelize.query(
+			`
+			SELECT id 
+			FROM users
+			WHERE email = :email`,
+			{
+				type: sequelize.QueryTypes.SELECT,
+				replacements: {
+					email
+				}
 			}
-		})
-		.catch(error => next(error));
+		);
+
+		if (users.length > 0) return next(errorMaker(409, 'Email already exists!'));
+
+		const currDate = new Date();
+		await sequelize.query(
+			`
+			INSERT INTO users
+				(
+					email,
+					created_at,
+					updated_at
+				)
+			VALUES
+				(
+					:email,
+					:curr_date,
+					:curr_date
+				)`,
+			{
+				type: sequelize.QueryTypes.INSERT,
+				replacements: {
+					email,
+					curr_date: currDate
+				}
+			}
+		);
+
+		return res.status(200).json({ message: 'Successfully signed up' });
+	} catch (e) {
+		return next(e);
+	}
 };