diff --git a/.gitignore b/.gitignore
deleted file mode 100644
index 25c8fdb..0000000
--- a/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-node_modules
-package-lock.json
\ No newline at end of file
diff --git a/README.md b/README.md
deleted file mode 100644
index 1b4ecc8..0000000
--- a/README.md
+++ /dev/null
@@ -1,65 +0,0 @@
-# Node.js – JWT Authentication example with PostgreSQL example
-
-## User Registration, User Login and Authorization process.
-The diagram shows flow of how we implement User Registration, User Login and Authorization process.
-
-![jwt-token-authentication-node-js-example-flow](jwt-token-authentication-node-js-example-flow.png)
-
-For more detail, please visit:
-> [Node.js JWT Authentication & Authorization with PostgreSQL example](https://www.bezkoder.com/node-js-jwt-authentication-postgresql/)
-
-You may need to implement Refresh Token:
-
-![jwt-refresh-token-node-js-example-flow](jwt-refresh-token-node-js-example-flow.png)
-
-> [Node.js JWT Refresh Token example](https://www.bezkoder.com/jwt-refresh-token-node-js/)
-
-Working with Front-end:
-> [Vue.js JWT Authentication with Vuex and Vue Router](https://www.bezkoder.com/jwt-vue-vuex-authentication/)
-
-> [Angular 8 JWT Authentication example](https://www.bezkoder.com/angular-jwt-authentication/)
-
-> [Angular 10 JWT Authentication example](https://www.bezkoder.com/angular-10-jwt-auth/)
-
-> [Angular 11 JWT Authentication example](https://www.bezkoder.com/angular-11-jwt-auth/)
-
-> [Angular 12 JWT Authentication example](https://www.bezkoder.com/angular-12-jwt-auth/)
-
-> [Angular 13 JWT Authentication example](https://www.bezkoder.com/angular-13-jwt-auth/)
-
-> [React JWT Authentication & Authorization (without Redux) example](https://www.bezkoder.com/react-jwt-auth/)
-
-> [React Redux JWT Authentication & Authorization example](https://www.bezkoder.com/react-redux-jwt-auth/)
-
-## More Practice:
-> [Node.js CRUD Rest APIs with Express, Sequelize & PostgreSQL example](https://www.bezkoder.com/node-express-sequelize-postgresql/)
-
-> [Node.js Express Pagination with PostgreSQL example](https://www.bezkoder.com/node-js-pagination-postgresql/)
-
-> [Node.js Express File Upload Rest API example](https://www.bezkoder.com/node-js-express-file-upload/)
-
-> [Node.js Express File Upload with Google Cloud Storage example](https://www.bezkoder.com/google-cloud-storage-nodejs-upload-file/)
-
-Associations:
-> [Sequelize Associations: One-to-Many Relationship example](https://www.bezkoder.com/sequelize-associate-one-to-many/)
-
-> [Sequelize Associations: Many-to-Many Relationship example](https://www.bezkoder.com/sequelize-associate-many-to-many/)
-
-Integration on same Server/Port:
-> [Integrate Vue with Node.js Express](https://www.bezkoder.com/serve-vue-app-express/)
-
-> [Integrate Angular with Node.js Express](https://www.bezkoder.com/integrate-angular-12-node-js/)
-
-> [Integrate React with Node.js Express](https://www.bezkoder.com/integrate-react-express-same-server-port/)
-
-## Project setup
-```
-npm install
-```
-
-Then, edit `app/config/db.config.js` with correct DB credentials.
-
-### Run
-```
-node server.js
-```
diff --git a/app/config/auth.config.js b/app/config/auth.config.js
deleted file mode 100644
index 4819df3..0000000
--- a/app/config/auth.config.js
+++ /dev/null
@@ -1,3 +0,0 @@
-module.exports = {
-  secret: "bezkoder-secret-key"
-};
diff --git a/app/config/db.config.js b/app/config/db.config.js
deleted file mode 100644
index d186745..0000000
--- a/app/config/db.config.js
+++ /dev/null
@@ -1,13 +0,0 @@
-module.exports = {
-  HOST: "localhost",
-  USER: "postgres",
-  PASSWORD: "123",
-  DB: "testdb",
-  dialect: "postgres",
-  pool: {
-    max: 5,
-    min: 0,
-    acquire: 30000,
-    idle: 10000
-  }
-};
\ No newline at end of file
diff --git a/app/controllers/auth.controller.js b/app/controllers/auth.controller.js
deleted file mode 100644
index 4dc09f6..0000000
--- a/app/controllers/auth.controller.js
+++ /dev/null
@@ -1,91 +0,0 @@
-const db = require("../models");
-const config = require("../config/auth.config");
-const User = db.user;
-const Role = db.role;
-
-const Op = db.Sequelize.Op;
-
-var jwt = require("jsonwebtoken");
-var bcrypt = require("bcryptjs");
-
-exports.signup = (req, res) => {
-  // Save User to Database
-  User.create({
-    username: req.body.username,
-    email: req.body.email,
-    password: bcrypt.hashSync(req.body.password, 8)
-  })
-    .then(user => {
-      if (req.body.roles) {
-        Role.findAll({
-          where: {
-            name: {
-              [Op.or]: req.body.roles
-            }
-          }
-        }).then(roles => {
-          user.setRoles(roles).then(() => {
-            res.send({ message: "User registered successfully!" });
-          });
-        });
-      } else {
-        // user role = 1
-        user.setRoles([1]).then(() => {
-          res.send({ message: "User registered successfully!" });
-        });
-      }
-    })
-    .catch(err => {
-      res.status(500).send({ message: err.message });
-    });
-};
-
-exports.signin = (req, res) => {
-  User.findOne({
-    where: {
-      username: req.body.username
-    }
-  })
-    .then(user => {
-      if (!user) {
-        return res.status(404).send({ message: "User Not found." });
-      }
-
-      var passwordIsValid = bcrypt.compareSync(
-        req.body.password,
-        user.password
-      );
-
-      if (!passwordIsValid) {
-        return res.status(401).send({
-          accessToken: null,
-          message: "Invalid Password!"
-        });
-      }
-
-      const token = jwt.sign({ id: user.id },
-                              config.secret,
-                              {
-                                algorithm: 'HS256',
-                                allowInsecureKeySizes: true,
-                                expiresIn: 86400, // 24 hours
-                              });
-
-      var authorities = [];
-      user.getRoles().then(roles => {
-        for (let i = 0; i < roles.length; i++) {
-          authorities.push("ROLE_" + roles[i].name.toUpperCase());
-        }
-        res.status(200).send({
-          id: user.id,
-          username: user.username,
-          email: user.email,
-          roles: authorities,
-          accessToken: token
-        });
-      });
-    })
-    .catch(err => {
-      res.status(500).send({ message: err.message });
-    });
-};
diff --git a/app/controllers/user.controller.js b/app/controllers/user.controller.js
deleted file mode 100644
index e2fa15b..0000000
--- a/app/controllers/user.controller.js
+++ /dev/null
@@ -1,15 +0,0 @@
-exports.allAccess = (req, res) => {
-  res.status(200).send("Public Content.");
-};
-
-exports.userBoard = (req, res) => {
-  res.status(200).send("User Content.");
-};
-
-exports.adminBoard = (req, res) => {
-  res.status(200).send("Admin Content.");
-};
-
-exports.moderatorBoard = (req, res) => {
-  res.status(200).send("Moderator Content.");
-};
diff --git a/app/middleware/authJwt.js b/app/middleware/authJwt.js
deleted file mode 100644
index ccb5605..0000000
--- a/app/middleware/authJwt.js
+++ /dev/null
@@ -1,91 +0,0 @@
-const jwt = require("jsonwebtoken");
-const config = require("../config/auth.config.js");
-const db = require("../models");
-const User = db.user;
-
-verifyToken = (req, res, next) => {
-  let token = req.headers["x-access-token"];
-
-  if (!token) {
-    return res.status(403).send({
-      message: "No token provided!"
-    });
-  }
-
-  jwt.verify(token,
-            config.secret,
-            (err, decoded) => {
-              if (err) {
-                return res.status(401).send({
-                  message: "Unauthorized!",
-                });
-              }
-              req.userId = decoded.id;
-              next();
-            });
-};
-
-isAdmin = (req, res, next) => {
-  User.findByPk(req.userId).then(user => {
-    user.getRoles().then(roles => {
-      for (let i = 0; i < roles.length; i++) {
-        if (roles[i].name === "admin") {
-          next();
-          return;
-        }
-      }
-
-      res.status(403).send({
-        message: "Require Admin Role!"
-      });
-      return;
-    });
-  });
-};
-
-isModerator = (req, res, next) => {
-  User.findByPk(req.userId).then(user => {
-    user.getRoles().then(roles => {
-      for (let i = 0; i < roles.length; i++) {
-        if (roles[i].name === "moderator") {
-          next();
-          return;
-        }
-      }
-
-      res.status(403).send({
-        message: "Require Moderator Role!"
-      });
-    });
-  });
-};
-
-isModeratorOrAdmin = (req, res, next) => {
-  User.findByPk(req.userId).then(user => {
-    user.getRoles().then(roles => {
-      for (let i = 0; i < roles.length; i++) {
-        if (roles[i].name === "moderator") {
-          next();
-          return;
-        }
-
-        if (roles[i].name === "admin") {
-          next();
-          return;
-        }
-      }
-
-      res.status(403).send({
-        message: "Require Moderator or Admin Role!"
-      });
-    });
-  });
-};
-
-const authJwt = {
-  verifyToken: verifyToken,
-  isAdmin: isAdmin,
-  isModerator: isModerator,
-  isModeratorOrAdmin: isModeratorOrAdmin
-};
-module.exports = authJwt;
diff --git a/app/middleware/index.js b/app/middleware/index.js
deleted file mode 100644
index 78a3414..0000000
--- a/app/middleware/index.js
+++ /dev/null
@@ -1,7 +0,0 @@
-const authJwt = require("./authJwt");
-const verifySignUp = require("./verifySignUp");
-
-module.exports = {
-  authJwt,
-  verifySignUp
-};
diff --git a/app/middleware/verifySignUp.js b/app/middleware/verifySignUp.js
deleted file mode 100644
index 2e2e030..0000000
--- a/app/middleware/verifySignUp.js
+++ /dev/null
@@ -1,57 +0,0 @@
-const db = require("../models");
-const ROLES = db.ROLES;
-const User = db.user;
-
-checkDuplicateUsernameOrEmail = (req, res, next) => {
-  // Username
-  User.findOne({
-    where: {
-      username: req.body.username
-    }
-  }).then(user => {
-    if (user) {
-      res.status(400).send({
-        message: "Failed! Username is already in use!"
-      });
-      return;
-    }
-
-    // Email
-    User.findOne({
-      where: {
-        email: req.body.email
-      }
-    }).then(user => {
-      if (user) {
-        res.status(400).send({
-          message: "Failed! Email is already in use!"
-        });
-        return;
-      }
-
-      next();
-    });
-  });
-};
-
-checkRolesExisted = (req, res, next) => {
-  if (req.body.roles) {
-    for (let i = 0; i < req.body.roles.length; i++) {
-      if (!ROLES.includes(req.body.roles[i])) {
-        res.status(400).send({
-          message: "Failed! Role does not exist = " + req.body.roles[i]
-        });
-        return;
-      }
-    }
-  }
-  
-  next();
-};
-
-const verifySignUp = {
-  checkDuplicateUsernameOrEmail: checkDuplicateUsernameOrEmail,
-  checkRolesExisted: checkRolesExisted
-};
-
-module.exports = verifySignUp;
diff --git a/app/models/index.js b/app/models/index.js
deleted file mode 100644
index f57f9e9..0000000
--- a/app/models/index.js
+++ /dev/null
@@ -1,37 +0,0 @@
-const config = require("../config/db.config.js");
-
-const Sequelize = require("sequelize");
-const sequelize = new Sequelize(
-  config.DB,
-  config.USER,
-  config.PASSWORD,
-  {
-    host: config.HOST,
-    dialect: config.dialect,
-    pool: {
-      max: config.pool.max,
-      min: config.pool.min,
-      acquire: config.pool.acquire,
-      idle: config.pool.idle
-    }
-  }
-);
-
-const db = {};
-
-db.Sequelize = Sequelize;
-db.sequelize = sequelize;
-
-db.user = require("../models/user.model.js")(sequelize, Sequelize);
-db.role = require("../models/role.model.js")(sequelize, Sequelize);
-
-db.role.belongsToMany(db.user, {
-  through: "user_roles"
-});
-db.user.belongsToMany(db.role, {
-  through: "user_roles"
-});
-
-db.ROLES = ["user", "admin", "moderator"];
-
-module.exports = db;
diff --git a/app/models/role.model.js b/app/models/role.model.js
deleted file mode 100644
index 345c247..0000000
--- a/app/models/role.model.js
+++ /dev/null
@@ -1,13 +0,0 @@
-module.exports = (sequelize, Sequelize) => {
-  const Role = sequelize.define("roles", {
-    id: {
-      type: Sequelize.INTEGER,
-      primaryKey: true
-    },
-    name: {
-      type: Sequelize.STRING
-    }
-  });
-
-  return Role;
-};
diff --git a/app/models/user.model.js b/app/models/user.model.js
deleted file mode 100644
index 63b8c28..0000000
--- a/app/models/user.model.js
+++ /dev/null
@@ -1,15 +0,0 @@
-module.exports = (sequelize, Sequelize) => {
-  const User = sequelize.define("users", {
-    username: {
-      type: Sequelize.STRING
-    },
-    email: {
-      type: Sequelize.STRING
-    },
-    password: {
-      type: Sequelize.STRING
-    }
-  });
-
-  return User;
-};
diff --git a/app/routes/auth.routes.js b/app/routes/auth.routes.js
deleted file mode 100644
index a4fcd91..0000000
--- a/app/routes/auth.routes.js
+++ /dev/null
@@ -1,23 +0,0 @@
-const { verifySignUp } = require("../middleware");
-const controller = require("../controllers/auth.controller");
-
-module.exports = function(app) {
-  app.use(function(req, res, next) {
-    res.header(
-      "Access-Control-Allow-Headers",
-      "x-access-token, Origin, Content-Type, Accept"
-    );
-    next();
-  });
-
-  app.post(
-    "/api/auth/signup",
-    [
-      verifySignUp.checkDuplicateUsernameOrEmail,
-      verifySignUp.checkRolesExisted
-    ],
-    controller.signup
-  );
-
-  app.post("/api/auth/signin", controller.signin);
-};
diff --git a/app/routes/user.routes.js b/app/routes/user.routes.js
deleted file mode 100644
index 10f00c5..0000000
--- a/app/routes/user.routes.js
+++ /dev/null
@@ -1,32 +0,0 @@
-const { authJwt } = require("../middleware");
-const controller = require("../controllers/user.controller");
-
-module.exports = function(app) {
-  app.use(function(req, res, next) {
-    res.header(
-      "Access-Control-Allow-Headers",
-      "x-access-token, Origin, Content-Type, Accept"
-    );
-    next();
-  });
-
-  app.get("/api/test/all", controller.allAccess);
-
-  app.get(
-    "/api/test/user",
-    [authJwt.verifyToken],
-    controller.userBoard
-  );
-
-  app.get(
-    "/api/test/mod",
-    [authJwt.verifyToken, authJwt.isModerator],
-    controller.moderatorBoard
-  );
-
-  app.get(
-    "/api/test/admin",
-    [authJwt.verifyToken, authJwt.isAdmin],
-    controller.adminBoard
-  );
-};
diff --git a/jwt-refresh-token-node-js-example-flow.png b/jwt-refresh-token-node-js-example-flow.png
deleted file mode 100644
index 6db0461..0000000
Binary files a/jwt-refresh-token-node-js-example-flow.png and /dev/null differ
diff --git a/jwt-token-authentication-node-js-example-flow.png b/jwt-token-authentication-node-js-example-flow.png
deleted file mode 100644
index 8c4efed..0000000
Binary files a/jwt-token-authentication-node-js-example-flow.png and /dev/null differ
diff --git a/package.json b/package.json
deleted file mode 100644
index 42ff21f..0000000
--- a/package.json
+++ /dev/null
@@ -1,27 +0,0 @@
-{
-  "name": "node-js-jwt-auth-postgresql",
-  "version": "1.0.0",
-  "description": "Node.js Demo for JWT Authentication with PostgreSQL",
-  "main": "server.js",
-  "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
-  },
-  "keywords": [
-    "node js",
-    "express",
-    "jwt",
-    "authentication",
-    "postgresql"
-  ],
-  "author": "bezkoder",
-  "license": "ISC",
-  "dependencies": {
-    "bcryptjs": "^2.4.3",
-    "cors": "^2.8.5",
-    "express": "^4.18.2",
-    "jsonwebtoken": "^9.0.0",
-    "pg": "^8.11.1",
-    "pg-hstore": "^2.3.4",
-    "sequelize": "^6.32.1"
-  }
-}
diff --git a/server.js b/server.js
deleted file mode 100644
index 71e6e0a..0000000
--- a/server.js
+++ /dev/null
@@ -1,59 +0,0 @@
-const express = require("express");
-const cors = require("cors");
-
-const app = express();
-
-var corsOptions = {
-  origin: "http://localhost:8081"
-};
-
-app.use(cors(corsOptions));
-
-// parse requests of content-type - application/json
-app.use(express.json());
-
-// parse requests of content-type - application/x-www-form-urlencoded
-app.use(express.urlencoded({ extended: true }));
-
-// database
-const db = require("./app/models");
-const Role = db.role;
-
-// db.sequelize.sync();
-// force: true will drop the table if it already exists
-db.sequelize.sync({force: true}).then(() => {
-  console.log('Drop and Resync Database with { force: true }');
-  initial();
-});
-
-// simple route
-app.get("/", (req, res) => {
-  res.json({ message: "Welcome to bezkoder application." });
-});
-
-// routes
-require('./app/routes/auth.routes')(app);
-require('./app/routes/user.routes')(app);
-
-// set port, listen for requests
-const PORT = process.env.PORT || 8080;
-app.listen(PORT, () => {
-  console.log(`Server is running on port ${PORT}.`);
-});
-
-function initial() {
-  Role.create({
-    id: 1,
-    name: "user"
-  });
- 
-  Role.create({
-    id: 2,
-    name: "moderator"
-  });
- 
-  Role.create({
-    id: 3,
-    name: "admin"
-  });
-}
\ No newline at end of file