diff --git a/classes/Auth.js b/classes/Auth.js
index e69de29..aecfabc 100644
--- a/classes/Auth.js
+++ b/classes/Auth.js
@@ -0,0 +1,19 @@
+const Customer = require('./Customer');
+
+class Auth {
+  constructor() {
+    this.customers = [];
+  }
+
+  register(name, email, shippingAddress) {
+    const newCustomer = new Customer(name, email, shippingAddress);
+    this.customers.push(newCustomer);
+    return newCustomer;
+  }
+
+  login(email) {
+    return this.customers.find(cust => cust.email === email) || null;
+  }
+}
+
+module.exports = Auth;
diff --git a/classes/Customer.js b/classes/Customer.js
index e69de29..33166ec 100644
--- a/classes/Customer.js
+++ b/classes/Customer.js
@@ -0,0 +1,15 @@
+class Customer {
+    constructor(name, email, shippingAddress) {
+      this.name = name;
+      this.email = email;
+      this.shippingAddress = shippingAddress;
+      this.orderHistory = [];
+    }
+  
+    addToOrderHistory(cart) {
+      this.orderHistory.push(cart);
+    }
+  }
+  
+  module.exports = Customer;
+  
\ No newline at end of file
diff --git a/index.js b/index.js
index efad601..9e6b55f 100644
--- a/index.js
+++ b/index.js
@@ -1,6 +1,14 @@
 // Import Classes Here
 
+// Import Classes Here
+const Product = require('./classes/Product');
+const Cart = require('./classes/Cart');
+const Customer = require('./classes/Customer');
+const Auth = require('./classes/Auth');
+
+
 
+// Example usage for manual testing