diff --git a/src/script.js b/src/script.js
index 529f585..f245c36 100644
--- a/src/script.js
+++ b/src/script.js
@@ -30,6 +30,22 @@ addEventListener("submit", (event) => {
   // 2. empty email
   // 3. taken email
   // 4. repeat email
+  let emailTaken = false;
+  // Loop through to check if already used, if so marks emailTaken true
+  usersTable.forEach((x) => {
+    if (x.username === email) {
+      emailTaken = true;
+      renderEmailTakenError();
+    }
+  });
+  // If email is empty render empty error
+  if (!email) {
+    renderEmailEmptyError();
+  } else if (!emailTaken) {
+    // If emailTaken false, add username object to array and render success
+    usersTable.push({ username: email });
+    renderSuccess();
+  }
 });
 
 let toggleNav = () => {