Authorization - Part 3: Check User Exists | Part #156

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• ✓1Create a Node.js Project from Scratch | npm init, package.json & Nodemon Setup Explained | Part #51
• ✓2What is ExpressJS? Installing & Setting Up Your First Express App | Part #52
• ✓3Start Express Server & Handle Incoming Requests - Creating a Web Server | Part #53
• ✓4Express.js Routing Explained - Introduction to HTTP Request Types & Response Methods | Part #54
• ✓5Web Development Fundamentals: Frontend vs. Backend vs. Full Stack (2026) | Part #55
• ✓6Static vs. Dynamic Websites - Everything You Need to Know | Part #56
• ✓7API Powered Websites Explained | Short Introduction to Web APIs & Client-Side Rendering | Part #57
• ✓8REST Architecture & RESTful APIs Explained | REST Principles & Best Practices | Part #58
• ✓9HTTP Response Status Codes Explained - When to Use 200, 201, 404, 500, and More | Part #59
• ✓10Build a Simple GET API in Express (No Database Needed) | Get All Hotels from JSON File | Part #60
• ✓11Installing Postman - The Ultimate API Testing Tool for Node JS | Part #61
• ✓12Handle POST Requests in Express | Build a Create Hotel API - Body Parsing & File Writing | Part #62
• ✓13Add Controller in Express (MVC Architecture) | Moving Route Handler Logic to Controllers | Part #63
• ✓14Reading Express Route Parameters | Understanding Param Object & Optional Parameters | Part #64
• ✓15Handle Find By ID Requests in Express | Build a Search API & Handling "Not Found" Errors | Part #65
• ✓16How to Update Data in Express API: Building the PATCH Endpoint | PUT vs PATCH Explained | Part #66
• ✓17Implementing the DELETE API Endpoint | How to Delete Resources in Express | Part #67
• ✓18Route Chaining in Express JS Explained | Chain Multiple Routes with app.route() | Part #68
• ✓19Mounting Routes in Express | How to Organize Large Express Apps: Using express.Router() | Part #69
• ✓20Express.js Middleware Explained: The Request-Response Lifecycle | Part #70
• ✓21Create Your First Custom Middleware in Express JS (Step-by-Step) | Part #71
• ✓22Using Third-Party Middleware in Express: The Morgan Logger Middleware Explained | Part #72
• ✓23Mastering Param Middleware in Express JS: Targeting Route Parameters | Part #73
• ✓24Practical Use Case for Param Middleware | Building a "Check Resource Exists" Middleware | Part #74
• ✓25Middleware Chaining in Express JS | Validating Request Body before Save | Part #75
• ✓26How to Serve Static Files in Express JS | Understanding express.static() Method | Part #76
• ✓27Read Express Documentation Like a Pro | Section Summary: Middleware, Routing & Mounting | Part #77
• ✓28Introduction to MongoDB (SQL vs NoSQL) | Why it’s the Perfect Match for Node Applications | Part #78
• ✓29Setting Up Local MongoDB Development Environment: Install MongoDB & MongoShell on Windows | Part #79
• ✓30Create, Switch, and Drop Databases in MongoDB | Understanding the use Command & db Object | Part #80
• ✓31What is a MongoDB Document, JSON & BSON Type & Why MongoDB is More Flexible than SQL | Part #81
• ✓32MongoDB Collections : Implicit vs. Explicit Creation, Query, and Drop Collections | Part #82
• ✓33MongoDB CRUD: How to Insert Documents (insertOne vs insertMany), Duplicate Key Errors | Part #83
• ✓34MongoDB Read Operations: find() vs findOne() Explained | How to Include or Exclude Fields | Part #84
• ✓35MongoDB Update Operations: updateOne, updateMany and replaceOne | $set Operator Explained | Part #85
• ✓36MongoDB Delete Operations: deleteOne and deleteMany Explained (Avoid Common Errors) | Part #86
• ✓37Why MongoDB is So Fast: Understanding Cursors and Batching in MongoDB | Part #87
• ✓38MongoDB Comparison Operators: $gt, $lt, $in, and more | How to Filter Data Like a Pro | Part #88
• ✓39MongoDB Logical Operators Explained | Combine Multiple Conditions in MongoDB Queries | Part #89
• ✓40MongoDB Element Operators: Handling Missing Fields & Wrongly Typed Data | Part #90
• ✓41MongoDB Security 101: Enabling Authentication & Authorization | A Step-by-Step Guide | Part #91
• ✓42MongoDB Security: How to Create a Superuser in MongoDB | The userAdminAnyDatabase Role | Part #92
• ✓43MongoDB Role-Based Access Control: Creating a dbOwner User | Part #93
• ✓44MongoDB Compass Tutorial: The GUI for MongoDB (Installation & Setup) | Part #94
• ✓45MongoDB Atlas Tutorial: Deploying Your Database to the Cloud (Step-by-Step Tutorial) | Part #95
• ✓46Introduction to Mongoose ODM: Why Use Mongoose? Schemas, Models, and Validation Explained | Part #96
• ✓47Connecting Express to MongoDB Atlas with Mongoose | Handle Connection Errors & Events | Part #97
• ✓48Mongoose Schemas & Models Explained (The Blueprint for Your Data) | Part #98
• ✓49Mongoose Validation Tutorial: How to Add Custom Error Messages in Mongoose Schemas | Part #99
• ✓50Refactoring to MVC Architecture in Express & Mongoose | The MVC Pattern Explained | Part #100
• ✓51Mongoose Model.create() vs .save(): Implementing POST Requests with Mongoose Models | Part #101
• ✓52Mongoose find() Tutorial: Fetching All Documents & Response Enveloping | Part #102
• ✓53How to Use Express Route Parameters (req.params) with Mongoose findById() | #103
• ✓54Mongoose findByIdAndUpdate() Tutorial: Updating Data the Right Way | Part #104
• ✓55How to Delete Documents in Mongoose & Why 204 No Content is Standard | #105
• ✓56Modeling a Real-World Hotel API: Refactoring Mongoose Schemas | Part #106
• ✓57How to Bulk Import Data into MongoDB from Node JS | Building a Custom Mongoose Script | Part #107
• ✓58Implement Search & Filtering in Node.js API with Mongoose Query Params | Part #108
• ✓59Sanitize API Queries: How to Exclude Fields from req.query in Express | Part #109
• ✓60Advanced Filtering in Express (Part 1): How to Filter Data Ranges in Mongoose & Express | Part #110
• ✓61Advanced Filtering in Express (Part 2): Convert URL Queries into MongoDB Operators | Part #111
• ✓62Node.js Mongoose Sorting Tutorial | Query Object, sort(), Multiple Fields Explained | Part #112
• ✓63Implementing Dynamic Field Limiting & Projection | Reduce API Payload Size | Part #113
• ✓64Master API Pagination: Implementing skip() and limit() in Express | Part #114
• ✓65Alias Routes in Express.js Tutorial | Middleware + Query Manipulation Explained | Part #115
• ✓66Building a Reusable API Features Class | Advanced Query Pipeline with Method Chaining | Part #116
• ✓67Understanding Environment Variables in Node.js & Express (Part 1) | Node Environments | Part #117
• ✓68Managing Environment Variables with dotenv (Part 2) | Using .env Files in Node JS | Part #118
• ✓69MongoDB Aggregation Framework Explained | Data Analytics with MongoDB | Part #119
• ✓70Calculate Averages and Totals with Aggregation Pipeline | $match, $group, & $sort Stage | Part #120
• ✓71Flatten Arrays & Limit Fields with Aggregation Pipeline | $unwind & $project Stage | Part #121
• ✓72MongoDB Aggregation Pipeline | Building 3 Essential API Endpoints for Your App | Part #122
• ✓73Mongoose Virtual Properties Explained | Add Dynamic Fields Without Saving to DB | Part #123
• ✓74Introduction to Mongoose Middlewares | How to Intercept Database Operations | Part #124
• ✓75Mongoose Pre-Hook Document Middleware | Building Pre-Save Hook for Data Validation | Part #125
• ✓76Mongoose Post-Hook Document Middleware | Building an Automated Activity Logging System | Part #126
• ✓77Mongoose Pre-Query Middleware | Implementing Soft Deletes and Custom Update Logic | Part #127
• ✓78Mongoose Post Query Middleware | Global Filter with Regex and Automated Activity Logging | Part #128
• ✓79Mongoose Aggregation Middleware | Automatically Filter Deleted Documents in Express.js | Part #129
• ✓80Mongoose Built-in Validators | Schema Constraints and Data Transformers in Express | Part #130
• ✓81Mongoose Custom Validators and Getters | Advanced Schema Validation in Node.js & Express | Part #131
• ✓82Using Third-Party Validators in Mongoose | Integrating Validator.js with Express | Part #132
• ✓83Handling Unmatched Routes in Express.js | Creating a 404 Default Route | Part #133
• ✓84Global Error Handling Middleware in Express.js | Operational vs Programming Errors | Part #134
• ✓85Creating a Custom Error Class in Express.js for Global Error Handling | Part #135
• ✓86Building a Reusable Async Error Handler for Express | Error Handling in Express | Part #136
• ✓87Handling Missing Resources: Implementing 404 Errors for Invalid MongoDB IDs in Express | Part #137
• ✓88Environment Specific Error Handling: Development vs Production Errors in Express | Part #138
• ✓89Handling Mongoose Cast Errors: Transform Technical DB Errors into User-Friendly Response | Part #139
• ✓90Handling MongoDB Duplicate Key Errors: Providing Clear Feedback for Unique Constraints | Part #140
• ✓91Mongoose Validation Error Handling: Aggregating Multi-Field Schema Failures in Express | Part #141
• ✓92Handling Unhandled Promise Rejections Globally in Node.js: Graceful Shutdown PatternsB | Part #142
• ✓93Handling Uncaught Exceptions Globally in Express: Protecting Synchronous Code Paths | Part #143
• ✓94Debugging Node.js and Express Applications with VS Code: A Beginner's Guide | Part #144
• ✓95Introduction to Authentication vs. Authorization: Building Secure Express Applications | Part #145
• ✓96Build a Signup Endpoint: Save User to DataBase | Part #146
• ✓97Validate Confirm Password before Creating User | Node JS + Express Course with MongoDB | Part #147
• ✓98Password Hashing & Salting Explained | Complete Node JS + Express Course with MongoDB | Part #148
• ✓99Hashing Password with Salt Using Bcrypt | Complete Node JS + Express Course with MongoDB | Part #149
• ✓100Authentication & Authorization with JWT | Complete Node JS + Express Course with MongoDB | Part #150
• ✓101Auto Login New User After Signup with JWT | Node JS + Express Course with MongoDB | Part 151
• ✓102 User Login - Part 1: Validate Credentials & Find User | Part #152
• ✓103User Login - Part 2: Verify Password & Send JWT | Node JS + Express Course with MongoDB | Part #153
• ✓104Authorization - Part 1: Read Access Token | Node JS + Express Course with MongoDB | Part #154
• ✓105Authorization - Part 2: Validate Token | Complete Node JS + Express Course with MongoDB | Part #155
• ✓106Authorization - Part 3: Check User Exists | Part #156
• ✓107Authorization - Part 4: Is Password Changed | Node JS + Express Course with MongoDB | Part #157
• ✓108Advance Postman Settings - Auto Capture JWT | Node JS + Express Course with MongoDB | Part #158
• ✓109Build Role-Based Authorization in Express | Node JS + Express Course with MongoDB | Part #159
• ✓110Password Reset - Part 1: High Level Overview | Node JS + Express Course with MongoDB | Part #160
• ✓111Reset Password - Part 2: Generate Password Reset Token | Part #161
• ✓112Reset Password - Part 3: Send Password Reset Email | Part #162
• ✓113Reset Password - Part 4: Set a New Password | Part #163
• ✓114Update User Password (Secure Implementation) | Part #164
• ✓115Update User Details (Secure & Clean Approach) | Part #165
• ✓116Delete User (Deactivate Account Feature) | Part #166
• ✓117Express API to Get Logged-In User Details | Part #167
• ✓118MongoDB Data Modeling Explained | Part #168
• ✓119Embedding vs Referencing in MongoDB | Part #169
• ✓120Modeling Hotel Location - One-to-one Relation | Part #170
• ✓121Modeling Rooms - One-to-Many Relation | Part #171
• ✓122Create New Rooms & Relate to a Hotel | Part #172
• ✓123Query Hotel & Related Rooms (Without populate) | Part #173
• ✓124Fetch Related Documents with populate() | Part #174
• ✓125What Are Nested Routes in Express? | Part #175
• ✓126Delete Room & Remove the Reference From Hotel | Part #176
• ✓127Create GET API to Fetch All Rooms & Room by ID | Part #177
• ✓128Modelling Reviews & Parent Reference | Part #178
• ✓129Create Review API Endpoint | Part #179
• ✓130Fetch All Reviews & Populate Related Hotels | Part #180
• ✓131MongoDB Virtual Populate Explained | Part #181
• ✓132Factory Functions - Part 1 | Part #182
• ✓133Factory Functions - Part 2 | Part #183
• ✓134Calculate Average Rating - Part 1 | Part #184
• ✓135Calculate Average Rating - Part 2 | Part #185
• ✓136Calculate Cheapest Price for a Hotel | Part #186
• ✓137Introduction to MongoDB Index | Node JS + Express Course with MongoDB | Part #187
• ✓138Preventing Duplicate Reviews | Complete Node JS + Express Course | Part #188
• ✓139API Security Best Practices | Complete Node JS + Express Course | Part #189
• ✓140Using HTTP Only Cookies for JWT | Complete Node JS + Express Course | Part #190
• ✓141Protect APIs with Rate Limiting | Complete Node JS + Express Course | Part #191
• ✓142Setting HTTP Security Headers using Helmet | Complete Node JS + Express Course | Part #192
• ✓143Request Data Sanitization in Express | Complete Node JS + Express Course | Part #193
• ✓144HTTP Parameter Pollution Explained | Complete Node JS + Express Course | Part #194
• ✓145Set createdBy Field Using Logged-In User | Complete Node JS + Express Course | Part #195
• ✓146Limit Maximum Login Attempts in Express | Complete Node JS + Express Course | Part #196
• ✓147What is Client-Side Rendering | Complete Node JS + Express Course | Part #197
• ✓148React App Setup - Files & Folders Explained | Complete Node JS + Express Course | Part #198
• ✓149React Functional Components Explained | Complete Node JS + Express Course | Part #199
• ✓150How to Add Routing in React | Complete Node JS + Express Course | Part #200
• ✓151Design Home Page - Hero Section & Search Bar | Complete Node JS + Express Course | Part #201
• ✓152Design Home Page - Show Hotels by City & Type | Complete Node JS + Express Course | Part #202
• ✓153Design Home Page - Fetch Hotels by City | Complete Node JS + Express Course | Part #203
• ✓154Design Home Page - Fetch Hotels by Type | Complete Node JS + Express Course | Part #204
• ✓155Design Home Page - Fetch & Show Featured Hotels | Complete Node JS Express Course | Part #205
• ✓156Show Loading Spinner on API Call in React | Complete Node JS + Express Course | Part #206
• ✓157State Management in React with Redux Toolkit | Complete Node JS + Express Course | Part #207
• ✓158Design Hotel Listing Page in React | Complete Node JS + Express Course | Part #208
• ✓159Fetch All Hotels from Express API in React | Complete Node JS + Express Course | Part #209
• ✓160Show Ammenities in Hotel Card as Chips | Complete Node JS + Express Course | Part #210
• ✓161Add Pagination in React App | Complete Node JS + Express Course | Part #211
• ✓162Building Login & Signup Page in React | Complete Node JS + Express Course | Part #212
• ✓163Send Login Request from React | Complete Node JS + Express Course | Part #213
• ✓164Send Signup Request from React | Complete Node JS + Express Course | Part #214
• ✓165Show Success & Error Messages using Toaster | Complete Node JS + Express Course | Part #215
• ✓166How to Protect Routes in React | Complete Node JS + Express Course | Part #216
• ✓167#217 Get Logged-in User Data in React using JWT | Complete Node JS + Express Course with MongoDB
• ✓168#218 Restore User Session in React on App Restart | Complete Node JS + Express Course with MongoDB
• ✓169#219 Build User Profile Page in React - Part 1 | Complete Node JS + Express Course with MongoDB
• ✓170#220 Build User Profile Page in React - Part 2 | Complete Node JS + Express Course with MongoDB
• ✓171#221 Build Edit Profile Modal in React | Complete Node JS + Express Course with MongoDB
• ✓172#222 Update Logged User Detail from React - Part 1 | Complete Node JS + Express Course with MongoDB
• ✓173#223 Update Logged User Detail from React - Part 2 | Complete Node JS + Express Course with MongoDB
• ✓174#224 Introduction to Multer - File Uploads | Complete Node JS + Express Course with MongoDB
• ✓175#225 Multer Configuration - Storage & File Filter | Complete Node JS + Express Course with MongoDB
• ✓176#226 Resizing Image with Sharp in Express | Complete Node JS + Express Course with MongoDB
• ✓177#227 Upload Profile Picture from React App | Complete Node JS + Express Course with MongoDB
• ✓178#228 Multer Multiple File Upload (Different Fields)
• ✓179#229 Creating Environment Variables in React | Complete Node JS + Express Course with MongoDB
• ✓180#230 Implement Change Password Feature in React | Complete Node JS + Express Course with MongoDB
• ✓181#231 Implement Deactivate User Account in React | Complete Node JS + Express Course with MongoDB
• ✓182#232 Implement Cookie-Based Auth in React - Part 1 | Complete Node JS + Express Course with MongoDB
• ✓183#233 Implement Cookie-Based Auth in React - Part 2 | Complete Node JS + Express Course with MongoDB
• ✓184#234 Implement User Logout Feature (Step-by-Step) | Complete Node JS + Express Course with MongoDB
• ✓185#235 Upload Multiple Images with React & Node.js | Hotel Booking App
• ✓186#236 Build a Dynamic Hotel Detail Page in React | Hotel Detail UI - Part 1
• ✓187#237 Build a Dynamic Hotel Detail Page in React | Hotel Detail UI - Part 2
• ✓188#238 Fetch Hotel Details from API & Show in UI | Hotel Detail UI - Part 3
• ✓189#239 Add Interactive Maps with Mapbox & React | Hotel Detail UI - Part 4
• ✓190#240 Build Multi-Tab Update Form in React 🔥 | Hotel Admin Panel with Single State - Part 1
• ✓191#241 Build Basic Info & Location Tabs with State Binding | React Multi-Tab Form - Part 2
• ✓192#242 Amenities + Images Tab with State Binding 🔥| Complete React Admin Form 😱 - Part 3
• ✓193#243 React Form Submit to Express API 🔥 | Send FormData & Update Hotel (Full Guide)
• ✓194#244 React Multiple Image Upload + Preview 🔥 | Update FormData & Live Preview (Step-by-Step)
• ✓195#245 React Multi-Select Input 🔥 | Add Categories with Comma (Dynamic Tags Input Tutorial)
• ✓196#246 Make Reusable Form in React 🔥 | Convert Update to Create Hotel (Clean Approach)
• ✓197#247 Create a New Hotel 🔥 | React State + Express POST Request (Step-by-Step)
• ✓198#248 Simple Form Validation in React | Hotel Form Custom Validation (No Libraries!)
• ✓199#249 Building a Review Section in React (Part 1) | Hotel Booking App - Node JS + Express Course
• ✓200#250 Create Review Modal Component in React (Part 2) | Hotel Booking App - Node JS + Express Course
• ✓201#251 Star Rating Component in React | Display Ratings using React Icons
• ✓202Building a User Review Dashboard and Fixing State Logic | Part #252
• ✓203Building a Dynamic Review Form Modal with Star Rating Logic | Part #253
• ✓204Implementing Edit and Delete Review Logic with Node.js & React | Part #254
• ✓205Building a Reusable Custom Confirm Modal with Props and State | Part #255
• ✓206Updating Room Schema and Verifying API Endpoints | Part #256
• ✓207Integrating Room Functionality into Hotel Detail Page and Room Image Upload | Part #257
• ✓208Build a Reusable Room Form Modal: Dynamic Input Management and Image Previews (Part 1) | Part #258
• ✓209Build a Reusable Room Form Modal: Read Room Form Data & React State Management (Part 2) | Part #259
• ✓210Update Room Details from React: Implementing Multipart Form Data for Room Updates | Part #260
• ✓211Completing the Room CRUD: Implementing Create and Delete Room Functionality in React | Part #261
• ✓212React & Redux Bug Fixing: Syncing UI with Backend API and State Management | Part #262
• ✓213Advanced React Security: Handling Page Reloads and Protecting Routes with Auth State | Part #263

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