diff --git a/week-4/hard/database/index.js b/week-4/hard/database/index.js
index bc4f9a47..e1339f66 100644
--- a/week-4/hard/database/index.js
+++ b/week-4/hard/database/index.js
@@ -1,16 +1,24 @@
 const mongoose = require('mongoose');
+const dotenv = require('dotenv');
+dotenv.config();
 
 // Connect to MongoDB
-mongoose.connect('your-mongodb-url');
-
-// Define schemas
+mongoose.connect(process.env.MONGODB_URL)
+    .then(() => console.log("Connected to MongoDB"))
+    .catch((error) => console.error("MongoDB connection error:", error));
 
+// Defining user schemas
 const UserSchema = new mongoose.Schema({
-    // Schema definition here
+    username: { type: String, required: true },
+    email: { type: String, required: true, unique: true },
+    password: { type: String, required: true }
 });
 
+// Defining todo schemas
 const TodoSchema = new mongoose.Schema({
-    // Schema definition here
+    description: { type: String, required: true },
+    complete: { type: Boolean, default: false },
+    userid: { type: mongoose.Schema.ObjectId, ref: 'User' }
 });
 
 const User = mongoose.model('User', UserSchema);
@@ -19,4 +27,4 @@ const Todo = mongoose.model('Todo', TodoSchema);
 module.exports = {
     User,
     Todo
-}
\ No newline at end of file
+};
diff --git a/week-4/hard/index.js b/week-4/hard/index.js
index 9d2401cd..52205bec 100644
--- a/week-4/hard/index.js
+++ b/week-4/hard/index.js
@@ -1,15 +1,108 @@
 const express = require("express");
 const dotenv = require("dotenv");
 dotenv.config();
-
+const { z } = require('zod');
+const jwt = require('jsonwebtoken');
+const bcrypt = require('bcrypt');
 const app = express();
-const port = process.env.PORT;
+const { User, Todo } = require('./database/index');
+const auth = require('./middleware/user');
 
 app.use(express.json());
 
-app.get("/healthy", (req, res)=> res.send("I am Healthy"));
+app.get("/healthy", (req, res) => res.send("I am Healthy"));
+
+// POST endpoint to signup
+app.post('/signup', async (req, res) => {
+    const requiredBody = z.object({
+        username: z.string().min(3).max(32),
+        email: z.string().min(5).max(50).email(),
+        password: z.string().min(6).max(100).regex(/^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[!@#$%&*-])[A-Za-z\d!@#$%&*-]{8,}$/)
+    });
+
+    const requiredDataBody = requiredBody.safeParse(req.body);
+
+    if (!requiredDataBody.success) {
+        return res.status(403).json({
+            msg: "Incorrect credential",
+            error: requiredDataBody.error
+        });
+    }
+
+    const { username, email, password } = req.body;
+
+    const userExistOrNot = await User.findOne({ email });
+
+    if (userExistOrNot) {
+        return res.status(409).json({
+            msg: `User already exists with this email: ${email}`
+        });
+    }
+
+    const hashPassword = await bcrypt.hash(password, 10);
+
+    try {
+        await User.create({ username, email, password: hashPassword });
+        res.status(201).json({ msg: "Account created successfully" });
+    } catch (error) {
+        res.status(500).json({ msg: error.message });
+    }
+});
+
+// POST endpoint to signin
+app.post('/signin', async (req, res) => {
+    const { email, password } = req.body;
+    if (!email || !password) {
+        return res.status(403).json({ msg: "Please provide email and password" });
+    }
+
+    try {
+        const user = await User.findOne({ email });
+
+        if (!user) {
+            return res.status(404).json({ msg: `User does not exist with this email: ${email}` });
+        }
+
+        const passMatch = await bcrypt.compare(password, user.password);
+        if (passMatch) {
+            const token = jwt.sign({ id: user._id }, process.env.JWT_SECRET);
+            return res.status(200).json({ token });
+        } else {
+            return res.status(403).json({ msg: "Password is incorrect" });
+        }
+    } catch (error) {
+        res.status(500).json({ error: error.message });
+    }
+});
+
+// POST endpoint to add todo
+app.post('/todo', auth, async (req, res) => {
+    const { description, completed } = req.body;
+    const id = req.id;
+
+    if (description === undefined || completed === undefined) {
+        return res.status(400).json({ msg: "Please provide description and completed" });
+    }
+
+    try {
+        await Todo.create({ description, complete: completed, userid: id });
+        res.status(201).json({ msg: "Todo added successfully" });
+    } catch (error) {
+        res.status(500).json({ error: error.message });
+    }
+});
 
-//  start writing your routes here
+// GET endpoint to get all todos
+app.get('/todos', auth, async (req, res) => {
+    const id = req.id;
 
-app.listen(port, ()=> console.log(`server is running at http://localhost:${port}`));
+    try {
+        const userTodos = await Todo.find({ userid: id });
+        res.status(200).json(userTodos);
+    } catch (error) {
+        res.status(500).json({ msg: error.message });
+    }
+});
 
+const PORT = process.env.PORT || 3000;
+app.listen(PORT, () => console.log(`Server running on port ${PORT}`));
diff --git a/week-4/hard/middleware/user.js b/week-4/hard/middleware/user.js
index cb63496a..97fc9bdb 100644
--- a/week-4/hard/middleware/user.js
+++ b/week-4/hard/middleware/user.js
@@ -1,5 +1,24 @@
+const jwt = require('jsonwebtoken');
+const dotenv = require('dotenv');
+
+dotenv.config();
+
 function userMiddleware(req, res, next) {
-    // Implement user auth logic
+    const token = req.headers.token;
+    if (!token) {
+        return res.status(403).json({
+            msg: "Access token is missing"
+        });
+    }
+    try {
+        const verified = jwt.verify(token, process.env.JWT_SECRET);
+        req.id = verified.id;
+        next();
+    } catch (error) {
+        res.status(401).json({
+            error: "Invalid token"
+        });
+    }
 }
 
-module.exports = userMiddleware;
\ No newline at end of file
+module.exports = userMiddleware;
diff --git a/week-4/hard/package-lock.json b/week-4/hard/package-lock.json
index 2312a0a6..e4d2e493 100644
--- a/week-4/hard/package-lock.json
+++ b/week-4/hard/package-lock.json
@@ -9,11 +9,32 @@
       "version": "1.0.0",
       "license": "ISC",
       "dependencies": {
+        "bcrypt": "^5.1.1",
         "cors": "^2.8.5",
         "dotenv": "^16.4.5",
         "express": "^4.19.2",
         "jsonwebtoken": "^9.0.2",
-        "mongoose": "^8.6.1"
+        "mongoose": "^8.6.1",
+        "zod": "^3.23.8"
+      }
+    },
+    "node_modules/@mapbox/node-pre-gyp": {
+      "version": "1.0.11",
+      "resolved": "https://registry.npmjs.org/@mapbox/node-pre-gyp/-/node-pre-gyp-1.0.11.tgz",
+      "integrity": "sha512-Yhlar6v9WQgUp/He7BdgzOz8lqMQ8sU+jkCq7Wx8Myc5YFJLbEe7lgui/V7G1qB1DJykHSGwreceSaD60Y0PUQ==",
+      "dependencies": {
+        "detect-libc": "^2.0.0",
+        "https-proxy-agent": "^5.0.0",
+        "make-dir": "^3.1.0",
+        "node-fetch": "^2.6.7",
+        "nopt": "^5.0.0",
+        "npmlog": "^5.0.1",
+        "rimraf": "^3.0.2",
+        "semver": "^7.3.5",
+        "tar": "^6.1.11"
+      },
+      "bin": {
+        "node-pre-gyp": "bin/node-pre-gyp"
       }
     },
     "node_modules/@mongodb-js/saslprep": {
@@ -40,6 +61,11 @@
         "@types/webidl-conversions": "*"
       }
     },
+    "node_modules/abbrev": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.1.1.tgz",
+      "integrity": "sha512-nne9/IiQ/hzIhY6pdDnbBtz7DjPTKrY00P/zvPSm5pOFkl6xuGrGnXn/VtTNNfNtAfZ9/1RtehkszU9qcTii0Q=="
+    },
     "node_modules/accepts": {
       "version": "1.3.8",
       "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.8.tgz",
@@ -53,12 +79,88 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/agent-base": {
+      "version": "6.0.2",
+      "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-6.0.2.tgz",
+      "integrity": "sha512-RZNwNclF7+MS/8bDg70amg32dyeZGZxiDuQmZxKLAlQjr3jGyLx+4Kkk58UO7D2QdgFIQCovuSuZESne6RG6XQ==",
+      "dependencies": {
+        "debug": "4"
+      },
+      "engines": {
+        "node": ">= 6.0.0"
+      }
+    },
+    "node_modules/agent-base/node_modules/debug": {
+      "version": "4.3.7",
+      "resolved": "https://registry.npmjs.org/debug/-/debug-4.3.7.tgz",
+      "integrity": "sha512-Er2nc/H7RrMXZBFCEim6TCmMk02Z8vLC2Rbi1KEBggpo0fS6l0S1nnapwmIi3yW/+GOJap1Krg4w0Hg80oCqgQ==",
+      "dependencies": {
+        "ms": "^2.1.3"
+      },
+      "engines": {
+        "node": ">=6.0"
+      },
+      "peerDependenciesMeta": {
+        "supports-color": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/agent-base/node_modules/ms": {
+      "version": "2.1.3",
+      "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz",
+      "integrity": "sha512-6FlzubTLZG3J2a/NVCAleEhjzq5oxgHyaCU9yYXvcLsvoVaHJq/s5xXI6/XXP6tz7R9xAOtHnSO/tXtF3WRTlA=="
+    },
+    "node_modules/ansi-regex": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
+      "integrity": "sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==",
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/aproba": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/aproba/-/aproba-2.0.0.tgz",
+      "integrity": "sha512-lYe4Gx7QT+MKGbDsA+Z+he/Wtef0BiwDOlK/XkBrdfsh9J/jPPXbX0tE9x9cl27Tmu5gg3QUbUrQYa/y+KOHPQ=="
+    },
+    "node_modules/are-we-there-yet": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/are-we-there-yet/-/are-we-there-yet-2.0.0.tgz",
+      "integrity": "sha512-Ci/qENmwHnsYo9xKIcUJN5LeDKdJ6R1Z1j9V/J5wyq8nh/mYPEpIKJbBZXtZjG04HiK7zV/p6Vs9952MrMeUIw==",
+      "deprecated": "This package is no longer supported.",
+      "dependencies": {
+        "delegates": "^1.0.0",
+        "readable-stream": "^3.6.0"
+      },
+      "engines": {
+        "node": ">=10"
+      }
+    },
     "node_modules/array-flatten": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
       "integrity": "sha512-PCVAQswWemu6UdxsDFFX/+gVeYqKAod3D3UVm91jHwynguOwAvYPhx8nNlM++NqRcK6CxxpUafjmhIdKiHibqg==",
       "license": "MIT"
     },
+    "node_modules/balanced-match": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz",
+      "integrity": "sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw=="
+    },
+    "node_modules/bcrypt": {
+      "version": "5.1.1",
+      "resolved": "https://registry.npmjs.org/bcrypt/-/bcrypt-5.1.1.tgz",
+      "integrity": "sha512-AGBHOG5hPYZ5Xl9KXzU5iKq9516yEmvCKDg3ecP5kX2aB6UqTeXZxk2ELnDgDm6BQSMlLt9rDB4LoSMx0rYwww==",
+      "hasInstallScript": true,
+      "dependencies": {
+        "@mapbox/node-pre-gyp": "^1.0.11",
+        "node-addon-api": "^5.0.0"
+      },
+      "engines": {
+        "node": ">= 10.0.0"
+      }
+    },
     "node_modules/body-parser": {
       "version": "1.20.2",
       "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.20.2.tgz",
@@ -83,6 +185,15 @@
         "npm": "1.2.8000 || >= 1.4.16"
       }
     },
+    "node_modules/brace-expansion": {
+      "version": "1.1.11",
+      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
+      "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
+      "dependencies": {
+        "balanced-match": "^1.0.0",
+        "concat-map": "0.0.1"
+      }
+    },
     "node_modules/bson": {
       "version": "6.8.0",
       "resolved": "https://registry.npmjs.org/bson/-/bson-6.8.0.tgz",
@@ -126,6 +237,32 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/chownr": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/chownr/-/chownr-2.0.0.tgz",
+      "integrity": "sha512-bIomtDF5KGpdogkLd9VspvFzk9KfpyyGlS8YFVZl7TGPBHL5snIOnxeshwVgPteQ9b4Eydl+pVbIyE1DcvCWgQ==",
+      "engines": {
+        "node": ">=10"
+      }
+    },
+    "node_modules/color-support": {
+      "version": "1.1.3",
+      "resolved": "https://registry.npmjs.org/color-support/-/color-support-1.1.3.tgz",
+      "integrity": "sha512-qiBjkpbMLO/HL68y+lh4q0/O1MZFj2RX6X/KmMa3+gJD3z+WwI1ZzDHysvqHGS3mP6mznPckpXmw1nI9cJjyRg==",
+      "bin": {
+        "color-support": "bin.js"
+      }
+    },
+    "node_modules/concat-map": {
+      "version": "0.0.1",
+      "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
+      "integrity": "sha512-/Srv4dswyQNBfohGpz9o6Yb3Gz3SrUDqBH5rTuhGR7ahtlbYKnVxw2bCFMRljaA7EXHaXZ8wsHdodFvbkhKmqg=="
+    },
+    "node_modules/console-control-strings": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/console-control-strings/-/console-control-strings-1.1.0.tgz",
+      "integrity": "sha512-ty/fTekppD2fIwRvnZAVdeOiGd1c7YXEixbgJTNzqcxJWKQnjJ/V1bNEEE6hygpM3WjwHFUVK6HTjWSzV4a8sQ=="
+    },
     "node_modules/content-disposition": {
       "version": "0.5.4",
       "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.4.tgz",
@@ -201,6 +338,11 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/delegates": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/delegates/-/delegates-1.0.0.tgz",
+      "integrity": "sha512-bd2L678uiWATM6m5Z1VzNCErI3jiGzt6HGY8OVICs40JQq/HALfbyNJmp0UDakEY4pMMaN0Ly5om/B1VI/+xfQ=="
+    },
     "node_modules/depd": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/depd/-/depd-2.0.0.tgz",
@@ -220,6 +362,14 @@
         "npm": "1.2.8000 || >= 1.4.16"
       }
     },
+    "node_modules/detect-libc": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/detect-libc/-/detect-libc-2.0.3.tgz",
+      "integrity": "sha512-bwy0MGW55bG41VqxxypOsdSdGqLwXPI/focwgTYCFMbdUiBAxLg9CFzG08sz2aqzknwiX7Hkl0bQENjg8iLByw==",
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/dotenv": {
       "version": "16.4.5",
       "resolved": "https://registry.npmjs.org/dotenv/-/dotenv-16.4.5.tgz",
@@ -247,6 +397,11 @@
       "integrity": "sha512-WMwm9LhRUo+WUaRN+vRuETqG89IgZphVSNkdFgeb6sS/E4OrDIN7t48CAewSHXc6C8lefD8KKfr5vY61brQlow==",
       "license": "MIT"
     },
+    "node_modules/emoji-regex": {
+      "version": "8.0.0",
+      "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
+      "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A=="
+    },
     "node_modules/encodeurl": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/encodeurl/-/encodeurl-1.0.2.tgz",
@@ -370,6 +525,33 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/fs-minipass": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/fs-minipass/-/fs-minipass-2.1.0.tgz",
+      "integrity": "sha512-V/JgOLFCS+R6Vcq0slCuaeWEdNC3ouDlJMNIsacH2VtALiu9mV4LPrHc5cDl8k5aw6J8jwgWWpiTo5RYhmIzvg==",
+      "dependencies": {
+        "minipass": "^3.0.0"
+      },
+      "engines": {
+        "node": ">= 8"
+      }
+    },
+    "node_modules/fs-minipass/node_modules/minipass": {
+      "version": "3.3.6",
+      "resolved": "https://registry.npmjs.org/minipass/-/minipass-3.3.6.tgz",
+      "integrity": "sha512-DxiNidxSEK+tHG6zOIklvNOwm3hvCrbUrdtzY74U6HKTJxvIDfOUL5W5P2Ghd3DTkhhKPYGqeNUIh5qcM4YBfw==",
+      "dependencies": {
+        "yallist": "^4.0.0"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/fs.realpath": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/fs.realpath/-/fs.realpath-1.0.0.tgz",
+      "integrity": "sha512-OO0pH2lK6a0hZnAdau5ItzHPI6pUlvI7jMVnxUQRtw4owF2wk8lOSabtGDCTP4Ggrg2MbGnWO9X8K1t4+fGMDw=="
+    },
     "node_modules/function-bind": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/function-bind/-/function-bind-1.1.2.tgz",
@@ -379,6 +561,26 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/gauge": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/gauge/-/gauge-3.0.2.tgz",
+      "integrity": "sha512-+5J6MS/5XksCuXq++uFRsnUd7Ovu1XenbeuIuNRJxYWjgQbPuFhT14lAvsWfqfAmnwluf1OwMjz39HjfLPci0Q==",
+      "deprecated": "This package is no longer supported.",
+      "dependencies": {
+        "aproba": "^1.0.3 || ^2.0.0",
+        "color-support": "^1.1.2",
+        "console-control-strings": "^1.0.0",
+        "has-unicode": "^2.0.1",
+        "object-assign": "^4.1.1",
+        "signal-exit": "^3.0.0",
+        "string-width": "^4.2.3",
+        "strip-ansi": "^6.0.1",
+        "wide-align": "^1.1.2"
+      },
+      "engines": {
+        "node": ">=10"
+      }
+    },
     "node_modules/get-intrinsic": {
       "version": "1.2.4",
       "resolved": "https://registry.npmjs.org/get-intrinsic/-/get-intrinsic-1.2.4.tgz",
@@ -398,6 +600,26 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/glob": {
+      "version": "7.2.3",
+      "resolved": "https://registry.npmjs.org/glob/-/glob-7.2.3.tgz",
+      "integrity": "sha512-nFR0zLpU2YCaRxwoCJvL6UvCH2JFyFVIvwTLsIf21AuHlMskA1hhTdk+LlYJtOlYt9v6dvszD2BGRqBL+iQK9Q==",
+      "deprecated": "Glob versions prior to v9 are no longer supported",
+      "dependencies": {
+        "fs.realpath": "^1.0.0",
+        "inflight": "^1.0.4",
+        "inherits": "2",
+        "minimatch": "^3.1.1",
+        "once": "^1.3.0",
+        "path-is-absolute": "^1.0.0"
+      },
+      "engines": {
+        "node": "*"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/isaacs"
+      }
+    },
     "node_modules/gopd": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/gopd/-/gopd-1.0.1.tgz",
@@ -446,6 +668,11 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
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+      "version": "3.23.8",
+      "resolved": "https://registry.npmjs.org/zod/-/zod-3.23.8.tgz",
+      "integrity": "sha512-XBx9AXhXktjUqnepgTiE5flcKIYWi/rme0Eaj+5Y0lftuGBq+jyRu/md4WnuxqgP1ubdpNCsYEYPxrzVHD8d6g==",
+      "funding": {
+        "url": "https://github.com/sponsors/colinhacks"
+      }
     }
   }
 }
diff --git a/week-4/hard/package.json b/week-4/hard/package.json
index 9fc8e40c..ce70a571 100644
--- a/week-4/hard/package.json
+++ b/week-4/hard/package.json
@@ -10,10 +10,12 @@
   "license": "ISC",
   "description": "",
   "dependencies": {
+    "bcrypt": "^5.1.1",
     "cors": "^2.8.5",
     "dotenv": "^16.4.5",
     "express": "^4.19.2",
     "jsonwebtoken": "^9.0.2",
-    "mongoose": "^8.6.1"
+    "mongoose": "^8.6.1",
+    "zod": "^3.23.8"
   }
 }
diff --git a/week-4/middlewares/01-ratelimitter.js b/week-4/middlewares/01-ratelimitter.js
index 867228a6..e7f6cb3f 100644
--- a/week-4/middlewares/01-ratelimitter.js
+++ b/week-4/middlewares/01-ratelimitter.js
@@ -16,11 +16,36 @@ setInterval(() => {
     numberOfRequestsForUser = {};
 }, 1000)
 
+app.use(function(req, res, next){
+  const userId = req.headers['user-id'];
+
+  if(!userId){
+    res.status(400).send('id is required')
+  }
+
+
+  if(numberOfRequestsForUser[userId]){
+    numberOfRequestsForUser[userId]++;
+    
+  } else{
+    numberOfRequestsForUser[userId] = 1;
+  }
+
+
+  if(numberOfRequestsForUser[userId] > 5){
+    res.status(404).send('you have reached 5 requests per second')
+  } 
+
+  next()
+})
+
 app.get('/user', function(req, res) {
+
   res.status(200).json({ name: 'john' });
 });
 
 app.post('/user', function(req, res) {
+  
   res.status(200).json({ msg: 'created dummy user' });
 });
 
diff --git a/week-4/middlewares/01-requestcount.js b/week-4/middlewares/01-requestcount.js
index 0a326486..fd8292ed 100644
--- a/week-4/middlewares/01-requestcount.js
+++ b/week-4/middlewares/01-requestcount.js
@@ -10,6 +10,11 @@ let requestCount = 0;
 // maintain a count of the number of requests made to the server in the global
 // requestCount variable
 
+app.use(function(req, res, next){
+  requestCount++;
+  next()
+})
+
 app.get('/user', function(req, res) {
   res.status(200).json({ name: 'john' });
 });
diff --git a/week-4/middlewares/02-authmiddleware.js b/week-4/middlewares/02-authmiddleware.js
index 448a19a8..b7f4ef85 100644
--- a/week-4/middlewares/02-authmiddleware.js
+++ b/week-4/middlewares/02-authmiddleware.js
@@ -1,4 +1,3 @@
-
 //  Implement an authentication middleware that checks for a valid API key in the request headers.
 
 const express = require('express');
@@ -9,6 +8,13 @@ const VALID_API_KEY = '100xdevs_cohort3_super_secret_valid_api_key'; // key is 1
 // Middleware to check for a valid API key
 function authenticateAPIKey(req, res, next) {
     //  authenticate APIKey here
+    const apiKey = req.headers['100xdevs-api-key']
+    console.log(apiKey)
+    if(apiKey === VALID_API_KEY){
+        next()
+    } else{
+        res.status(401).json({message: 'Invalid or missing API key'})
+    }
 }
 
 app.use(authenticateAPIKey);
@@ -17,6 +23,6 @@ app.get('/', (req, res) => {
     res.status(200).json({ message: 'Access granted' });
 });
 
-module.exports = app;
-
+// app.listen(3000)
 
+module.exports = app;
\ No newline at end of file
diff --git a/week-4/middlewares/02-logIncomingRequests.js b/week-4/middlewares/02-logIncomingRequests.js
index 647018b8..49cbc413 100644
--- a/week-4/middlewares/02-logIncomingRequests.js
+++ b/week-4/middlewares/02-logIncomingRequests.js
@@ -5,6 +5,10 @@ const app = express();
 
 function logRequests(req, res, next) {
     // write the logic for request log here
+    
+    console.log(`${req.method} ${req.url} - ${new Date().toISOString()}`)
+    next()
+    
 }
 
 app.use(logRequests);
@@ -13,4 +17,6 @@ app.get('/', (req, res) => {
     res.status(200).json({ message: 'Hello, world!' });
 });
 
-module.exports = app;
+
+// app.listen(3000)
+module.exports = app;
\ No newline at end of file