Errors

try {
  const { token } = await vycheck({ session: sessionId, mode: "iframe" });
  if (!token) {
    // They closed it without finishing. Not an error. Let them retry.
  }
} catch (err) {
  // Session expired or already used, or the network failed. Mint a fresh
  // session and let them try again.
  console.error("verifyyou:", err.message);
}

class VerifyYouError extends Error {
  code: "timeout" | "network" | "http" | "bad_response";
  status?: number; // when code === "http"
}