import { isAPIError } from "better-auth/api";

/** Better Auth hatasından makine okunur kodu çıkarır (ör. "USERNAME_IS_ALREADY_TAKEN"). */
export function authErrorCode(error: unknown): string | undefined {
  if (!isAPIError(error)) return undefined;
  const body = error.body as { code?: unknown } | undefined;
  return typeof body?.code === "string" ? body.code : undefined;
}