feat(users): merge promotion into revenue center

inc/helpers/aksrt-transactions.php

@@ -55,8 +55,8 @@ function aksrt_get_revenue_page_view(int $user_id): array {
     $total_withdrawn = 0.0;
     $records         = [];
 
-    if (class_exists('\AKSRT\Credits\Credits')) {
-        $balance = (float) \AKSRT\Credits\Credits::balance($user_id);
+    if (class_exists('\AKSRT\Credits\Balance')) {
+        $balance = (float) \AKSRT\Credits\Balance::balance($user_id);
     }
 
     if (class_exists('\AKSRT\Payment\Revenue')) {