Always use async call for CheckAccess

extension/extension.cpp

@@ -424,25 +424,20 @@ void AuthBySteamGroup::AllowJoin(int client_id, std::string group_id,
 void AuthBySteamGroup::CheckAccess(int client_id, std::string group_id,
                                    std::string steam_key) {
   int user_id = GetUserIdByClientId(client_id);
+  auto async_op = std::async(
+      std::launch::async,
+      [this, user_id, group_id, steam_key]() -> std::function<void()> {
+        auto is_group_member =
+            CheckGroupMembership(user_id, group_id, steam_key);
+        if (!is_group_member.get()) {
+          return std::bind(&AuthBySteamGroup::CheckAccessFails, this, user_id);
+        }
 
-  auto check_membership = [this, user_id, group_id,
-                           steam_key]() -> std::function<void()> {
-    auto is_group_member = CheckGroupMembership(user_id, group_id, steam_key);
-    if (!is_group_member.get()) {
-      return std::bind(&AuthBySteamGroup::CheckAccessFails, this, user_id);
-    }
-
-    return std::bind(&AuthBySteamGroup::CheckAccessSucceeds, this, user_id);
-  };
+        return std::bind(&AuthBySteamGroup::CheckAccessSucceeds, this, user_id);
+      });
 
   std::lock_guard<std::mutex> lock(m_plugin_lock);
-  if (m_player_manager->GetNumPlayers() <= 1) {
-    check_membership()();
-    return;
-  }
-
-  m_async_operations.push_back(
-      std::async(std::launch::async, std::move(check_membership)));
+  m_async_operations.push_back(std::move(async_op));
 }
 
 void AuthBySteamGroup::PrintKickList(int client_id, std::string group_id,