Fix mistake

api/actions/changenick.php

@@ -14,4 +14,4 @@ if ($database->has("players", ["AND" => ["nickname" => $nick, "accountid[!]" =>
 
 $database->update("players", ["nickname" => $nick], ["accountid" => getRequestUser()->getUID()]);
 
-sendJsonResp(["name" => $nick]);
+exitWithJson(["status" => "OK", "name" => $nick]);