diff --git a/index.js b/index.js
index e189e725..bd17b0c0 100644
--- a/index.js
+++ b/index.js
@@ -5,69 +5,164 @@ const port = 3001
 const USERS = [];
 
 const QUESTIONS = [{
-    title: "Two states",
-    description: "Given an array , return the maximum of the array?",
-    testCases: [{
-        input: "[1,2,3,4,5]",
-        output: "5"
-    }]
+  title: "Two states",
+  description: "Given an array, return the maximum of the array?",
+  testCases: [{
+    input: "[1,2,3,4,5]",
+    output: "5"
+  }]
+},
+{
+  title: "Sum of Elements",
+  description: "Given an array of integers, return the sum of all elements in the array.",
+  testCases: [{
+    input: "[1,2,3,4,5]",
+    output: "15"
+  }]
+},
+{
+  title: "Reverse String",
+  description: "Given a string, return the string in reverse order.",
+  testCases: [{
+    input: "\"hello\"",
+    output: "\"olleh\""
+  }]
+},
+{
+  title: "Palindrome Check",
+  description: "Given a string, check if it is a palindrome. Return true if it is, otherwise false.",
+  testCases: [{
+    input: "\"racecar\"",
+    output: "true"
+  }]
+},
+{
+  title: "Factorial Calculation",
+  description: "Given a non-negative integer, return the factorial of the number.",
+  testCases: [{
+    input: "5",
+    output: "120"
+  }]
+},
+{
+  title: "Find Duplicates",
+  description: "Given an array of integers, return a list of duplicates in the array.",
+  testCases: [{
+    input: "[1,2,3,4,5,5,6,6]",
+    output: "[5,6]"
+  }]
 }];
 
 
-const SUBMISSION = [
+
+const SUBMISSIONS = [
 
 ]
 
-app.post('/signup', function(req, res) {
+app.post('/signup', function (req, res) {
   // Add logic to decode body
   // body should have email and password
-
+  const user = {
+    email: req.body.email,
+    password: req.body.password
+  }
+  USERS.push(user);
 
   //Store email and password (as is for now) in the USERS array above (only if the user with the given email doesnt exist)
 
 
   // return back 200 status code to the client
-  res.send('Hello World!')
+  res.status(200).send('Signup successful');
 })
 
-app.post('/login', function(req, res) {
+app.post('/login', function (req, res) {
   // Add logic to decode body
   // body should have email and password
-
+  let loginUserEmail = req.body.email
+  let loginUserPassword = req.body.password
   // Check if the user with the given email exists in the USERS array
   // Also ensure that the password is the same
-
-
+  const existingUser = USERS.find(user => user.loginUserEmail === loginUserEmail && user.password === loginUserPassword);
+  if (existingUser) {
+    let token = randonStringGenerator();
+    return res.status(200).send(`Welcome Here's your token ${token}`);
+  }
+  else {
+    return res.status(401).send('Could not find your email or password');
+  }
   // If the password is the same, return back 200 status code to the client
   // Also send back a token (any random string will do for now)
   // If the password is not the same, return back 401 status code to the client
+})
 
+function randonStringGenerator() {
+  let token = '';
+  const characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
+  const charactersLength = characters.length;
 
-  res.send('Hello World from route 2!')
-})
+  for (let i = 0; i < 15; i++) {
+    token += characters.charAt(Math.floor(Math.random() * charactersLength));
+  }
 
-app.get('/questions', function(req, res) {
+  return token;
+}
+
+app.get('/questions', function (req, res) {
 
   //return the user all the questions in the QUESTIONS array
-  res.send("Hello World from route 3!")
+  res.send(QUESTIONS)
 })
 
-app.get("/submissions", function(req, res) {
-   // return the users submissions for this problem
-  res.send("Hello World from route 4!")
+app.get("/submissions", function (req, res) {
+  // return the users submissions for this problem
+  res.send(SUBMISSIONS)
 });
 
 
-app.post("/submissions", function(req, res) {
-   // let the user submit a problem, randomly accept or reject the solution
-   // Store the submission in the SUBMISSION array above
-  res.send("Hello World from route 4!")
+app.post("/submissions", function (req, res) {
+  // let the user submit a problem, randomly accept or reject the solution
+
+  const submissionTitle = req.body.title;
+  const submissionAns = req.body.answer
+  let validSubmisson = QUESTIONS.find(question => question.title === submissionTitle && question.testCases[0].output === submissionAns)
+  if (validSubmisson) {
+    let submission = {
+      title: submissionTitle,
+      answer: submissionAns
+    }
+    // Store the submission in the SUBMISSION array above
+    SUBMISSIONS.push(submission);
+    res.status(200).send("Submission is correct and accepted")
+  } else {
+
+  }
 });
 
 // leaving as hard todos
 // Create a route that lets an admin add a new problem
 // ensure that only admins can do that.
 
-app.listen(port, function() {
+app.post('/questions', function (req, res) {
+
+  //return the user all the questions in the QUESTIONS array
+  if (req.body.userDesignation === "ADMIN") {
+    const newQuestion = {
+      title: req.body.title,
+      description: req.body.description,
+      testCases: req.body.testCases
+      //should be an js array
+      //  [{
+      //   input: "[1,2,3,4,5,5,6,6]",
+      //   output: "[5,6]"
+      // }]
+    }
+    QUESTIONS.push(newQuestion);
+    res.status(200).send(`Updated Questions array ${QUESTIONS}`)
+  } else {
+    res.send("Restricted Access")
+  }
+})
+
+app.listen(port, function () {
   console.log(`Example app listening on port ${port}`)
 })
\ No newline at end of file