Added compiuted property columns

Author: mrsaicharan1

app/controllers/account/billing-info/invoices.js

@@ -1,5 +1,6 @@
 import Controller from '@ember/controller';
 import { filterBy } from '@ember/object/computed';
+import { computed } from '@ember/object';
 
 export default class extends Controller {
   queryParams = ['page', 'per_page'];
@@ -11,4 +12,31 @@ export default class extends Controller {
   dueInvoices  = filterBy('model.eventInvoices', 'status', 'due');
   paidInvoices = filterBy('model.eventInvoices', 'status', 'paid');
 
+  @computed()
+  get columns() {
+    return [
+      {
+         name: 'Invoice ID',
+         valuePath: 'id'   
+      },
+      {
+        name: 'Event Name',
+        valuePath: 'eventName'   
+      },
+      {
+        name: 'Date Issued',
+        valuePath: 'dateIssued'   
+      },
+      {
+        name: 'Amount',
+        valuePath: 'amount'   
+      },
+      {
+        name: 'View Invoice',
+        valuePath: 'invoiceLink'   
+      },
+
+
+    ]
+  }
 }