diff --git a/final_project/package-lock.json b/final_project/package-lock.json
new file mode 100644
index 000000000..c9cd0b18b
--- /dev/null
+++ b/final_project/package-lock.json
@@ -0,0 +1,1150 @@
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+}
diff --git a/final_project/router/auth_users.js b/final_project/router/auth_users.js
index 8cb6ef6e4..880ea0dd5 100644
--- a/final_project/router/auth_users.js
+++ b/final_project/router/auth_users.js
@@ -7,16 +7,36 @@ let users = [];
 
 const isValid = (username)=>{ //returns boolean
 //write code to check is the username is valid
-}
+return users.some((user) => user.username === username);
+};
 
 const authenticatedUser = (username,password)=>{ //returns boolean
 //write code to check if username and password match the one we have in records.
-}
+const user = users.find(user => user.username === username);
+
+  // If user is found, check if the password matches
+  if (user) {
+    if (user.password === password) {
+      return true; // Authentication successful
+    } else {
+      return false; // Password does not match
+    }
+  } else {
+    return false; // User not found
+  }
+};
 
 //only registered users can login
 regd_users.post("/login", (req,res) => {
   //Write your code here
-  return res.status(300).json({message: "Yet to be implemented"});
+  const { username, password } = req.body;
+  const user = users.find((u) => u.username === username);
+  if (user && bcrypt.compareSync(password, user.password)) {
+    const token = jwt.sign({ id: user.id, username: user.username }, SECRET_KEY, { expiresIn: '1h' });
+    res.json({ token });
+  } else {
+    res.status(401).json({ message: 'Invalid credentials' });
+  }
 });
 
 // Add a book review
diff --git a/final_project/router/general.js b/final_project/router/general.js
index 9eb0ac1a9..d4e1ab1ee 100644
--- a/final_project/router/general.js
+++ b/final_project/router/general.js
@@ -7,37 +7,74 @@ const public_users = express.Router();
 
 public_users.post("/register", (req,res) => {
   //Write your code here
-  return res.status(300).json({message: "Yet to be implemented"});
+  const { username, password } = req.body;
+  if (!username || !password) {
+    return res.status(400).json({ message: "Username or password missing..." });
+  }
+  if (isValid(username)) {
+    return res.status(400).json({ message: "User already exists" });
+  }
+  // Add the new user
+  users.push({ username, password });
+  return res.status(200).json({ message: "User registered successfully" });
 });
 
 // Get the book list available in the shop
 public_users.get('/',function (req, res) {
   //Write your code here
-  return res.status(300).json({message: "Yet to be implemented"});
+  return res.status(200).json(books);
 });
 
 // Get book details based on ISBN
 public_users.get('/isbn/:isbn',function (req, res) {
   //Write your code here
-  return res.status(300).json({message: "Yet to be implemented"});
- });
+  const isbn = req.params.isbn;
+    const book = books[isbn];
+
+    if (book) {
+        return res.status(200).json(book);
+    } else {
+        return res.status(404).json({ message: "Book not found" });
+    }
+});
   
 // Get book details based on author
 public_users.get('/author/:author',function (req, res) {
   //Write your code here
-  return res.status(300).json({message: "Yet to be implemented"});
+  const author = req.params.author.toLowerCase();
+    const matchingBooks = Object.values(books).filter(book => book.author.toLowerCase() === author);
+
+    if (matchingBooks.length > 0) {
+        return res.status(200).json(matchingBooks);
+    } else {
+        return res.status(404).json({ message: "Books not found!" });
+    }
 });
 
 // Get all books based on title
 public_users.get('/title/:title',function (req, res) {
   //Write your code here
-  return res.status(300).json({message: "Yet to be implemented"});
+  const title = req.params.title.toLowerCase();
+    const matchingBooks = Object.values(books).filter(book => book.title.toLowerCase().includes(title));
+
+    if (matchingBooks.length > 0) {
+        return res.status(200).json(matchingBooks);
+    } else {
+        return res.status(404).json({ message: "No books found with the given title" });
+    }
 });
 
 //  Get book review
 public_users.get('/review/:isbn',function (req, res) {
   //Write your code here
-  return res.status(300).json({message: "Yet to be implemented"});
+  const isbn = req.params.isbn;
+    const book = books[isbn];
+
+    if (book) {
+        return res.status(200).json(book.reviews);
+    } else {
+        return res.status(404).json({ message: "Book not found" });
+    }
 });
 
-module.exports.general = public_users;
+module.exports.general = public_users;
\ No newline at end of file