added the model and router folder

__tests__/app.test.js

@@ -1,13 +0,0 @@
-import app from '../src/index';
-
-describe('app module', () => {
-  test('it exists', async () => {
-    expect(app).toBeDefined();
-  });
-
-  test('it returns program name with SDGs', async () => {
-    const result = await app();
-    const sdgPos = (result || '').indexOf('SDG');
-    expect(sdgPos).toBeGreaterThanOrEqual(0);
-  });
-});

package.json

@@ -33,10 +33,13 @@
   },
   "license": "MIT",
   "dependencies": {
+    "bcrypt": "^4.0.1",
+    "body-parser": "^1.19.0",
     "cors": "^2.8.5",
     "dotenv": "^8.2.0",
     "express": "^4.17.1",
     "mongoose": "^5.9.11",
+    "mongoose-unique-validator": "^2.0.3",
     "nodemon": "^2.0.3"
   },
   "devDependencies": {

src/app.js

@@ -1,3 +1,4 @@
+/* eslint-disable linebreak-style */
 const express = require('express');
 
 const cors = require('cors');
@@ -18,6 +19,10 @@ const connect = mongoose.connection;
 
 connect.once('open', () => 'connected');
 
+const registrationRoutes = require('./routes/registration');
+
+app.use('/auth', registrationRoutes);
+
 app.use((req, res) => {
   res.json({ message: 'your request wass successfull' });
 });

src/models/registration.js

@@ -0,0 +1,21 @@
+/* eslint-disable linebreak-style */
+/* eslint-disable eol-last */
+/* eslint-disable function-paren-newline */
+/* eslint-disable indent */
+/* eslint-disable linebreak-style */
+/* eslint-disable prefer-destructuring */
+/* eslint-disable linebreak-style */
+/* eslint-disable import/newline-after-import */
+const mongoose = require('mongoose');
+
+const Schema = mongoose.Schema;
+
+
+const signupSchema = new Schema({
+    username: { type: String, required: true }
+}
+);
+
+const Signup = mongoose.model('Signup', signupSchema);
+
+module.exports = Signup;

src/routes/registration.js

@@ -0,0 +1,19 @@
+/* eslint-disable linebreak-style */
+/* eslint-disable padded-blocks */
+/* eslint-disable eol-last */
+/* eslint-disable linebreak-style */
+const router = require('express').Router();
+
+const Signup = require('../models/registration');
+
+router.post('/add', (req, res) => {
+
+  const newsignup = new Signup({
+    username: req.body.username
+  });
+  newsignup.save()
+    .then(() => res.json('user registered'))
+    .catch((err) => res.status(400).json({ error: err }));
+});
+
+module.exports = router;

src/server.js

@@ -1,3 +1,4 @@
+/* eslint-disable linebreak-style */
 const http = require('http');
 
 const app = require('./app');