Protect a signup flow

export async function registerUser(input) {
  const response = await fetch("https://signupbear.com/v1/check", {
    method: "POST",
    headers: {
      Authorization: `Bearer ${process.env.SIGNUPBEAR_API_KEY}`,
      "Content-Type": "application/json",
    },
    body: JSON.stringify({ email: input.email }),
    signal: AbortSignal.timeout(3000),
  });

  const result = await response.json();

  if (!response.ok || result.status === "failed") {
    return applySignupRiskFallback({
      requestId: result.request_id,
      errorCode: result.error?.code,
    });
  }

  if (result.recommended_action === "block") {
    return { accepted: false, requestId: result.request_id };
  }

  return createAccount(input, {
    signupBearRequestId: result.request_id,
    signupBearAction: result.recommended_action,
  });
}