Change event registration return

functions.php

@@ -41,7 +41,7 @@ function register_event($cfg) {
     $stmt->bind_param("s", $event_token);
     $stmt->execute();
     $stmt->close();
-    return true;
+    return ["success" => true];
 }
 
 function save_hash($cfg, $event_id, $vote_round, $name, $hash) {