change key name from member to optedin

Model/GrouperGroup.php

@@ -82,7 +82,7 @@ public function filteredMemberOfGroups(string $userId) {
       foreach($optInGroups as $key => $value) {
         if ($value['name'] == $memberOfGroup['name']) {
           //Match!
-          $memberOfGroup['member'] = true;
+          $memberOfGroup['optedin'] = true;
           //Remove Optin group since already found and now less loops
           unset($optInGroups[$key]);
           break;