chore(docs): Generated API Reference (#2143)

Co-authored-by: olivermrbl <olivermrbl@users.noreply.github.com>

docs/api/admin/code_samples/JavaScript/customer-groups/postundefined

@@ -0,0 +1,9 @@
+import Medusa from "@medusajs/medusa-js"
+const medusa = new Medusa({ baseUrl: MEDUSA_BACKEND_URL, maxRetries: 3 })
+// must be previously logged in or use api token
+medusa.admin.customerGroups.create({
+  name: 'VIP'
+})
+.then(({ customer_group }) => {
+  console.log(customer_group.id);
+});