Created the authentication route

server/routes/auth.js

@@ -0,0 +1,22 @@
+const app = require('express').Router();
+const jwt = require('jsonwebtoken');
+const {validateSchema} = require("../util/validate");
+const {authValidation} = require("../validations/auth");
+const {getToken} = require("../controller/token");
+const {authUser} = require("../controller/user");
+
+app.post("/login", async (req, res) => {
+    const error = await validateSchema(authValidation, req.body);
+    if (error) return res.status(400).json({message: error});
+
+    let user = await authUser(req.body.username, req.body.password);
+    if (!user) return res.status(401).json({message: "Please use the correct username / password combination"});
+
+    const token = jwt.sign({userId: user.id}, getToken());
+
+    res.header("Authorization", token);
+
+    res.json({message: "Successfully logged in"});
+});
+
+module.exports = app;