add create user and login user parts

app/utils/users/createCustomerDetails.util.js

@@ -0,0 +1,54 @@
+//app/utils/users/createCustomerDetails.util.js
+
+const db = require("../../models");
+
+const { generateCustomerId } = require("../idGen.util");
+
+const Customer = db.Customer;
+
+const createCustomerDetails = async (
+  userId,
+  customerData,
+  transaction
+) => {
+
+  const {
+    address,
+    phoneNumber,
+  } = customerData;
+
+
+  if (!address || !phoneNumber) {
+    throw new Error(
+      "Address and phone number are required for customer"
+    );
+  }
+
+
+  const customer = await Customer.create(
+    {
+      customer_id:
+        generateCustomerId(),
+
+      user_id:
+        userId,
+
+      address:
+        address,
+
+      phoneNumber:
+        phoneNumber,
+    },
+    {
+      transaction,
+    }
+  );
+
+
+  return customer;
+};
+
+
+module.exports = {
+  createCustomerDetails,
+};