+ r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_creds_get_pid(creds, &pid);
+ if (r < 0)
+ return r;
+
+ r = manager_get_user_by_pid(m, pid, &user);
+ if (r <= 0)
+ return 0;
+ } else {
+ unsigned long lu;
+ const char *p;
+
+ p = startswith(path, "/org/freedesktop/login1/user/_");
+ if (!p)
+ return 0;
+
+ r = safe_atolu(p, &lu);
+ if (r < 0)
+ return 0;
+
+ user = hashmap_get(m->users, ULONG_TO_PTR(lu));
+ if (!user)
+ return 0;
+ }