Integrate in-app messages

const response = await fetch(
  "https://app.masivo.ai/api/storefront/v1/inapp/capabilities",
  {
    headers: {
      Authorization: `Bearer ${accessToken}`,
      "x-account-id": accountId
    }
  }
);
const { data } = await response.json();
// { inappEnabled: true, eventTypes: ["PURCHASE", "APP_OPEN"] }

const customerId = "user_abc123";
const params = new URLSearchParams({ limit: "5", trigger: "APP_OPEN" });
const response = await fetch(
  `https://app.masivo.ai/api/storefront/v1/customers/${customerId}/inapp-messages?${params}`,
  {
    headers: {
      Authorization: `Bearer ${accessToken}`,
      "x-account-id": accountId
    }
  }
);
const { data } = await response.json();
const messages = data.messages;

const messageId = messages[0].id;
const payload = { action: "shown" as const };

await fetch(
  `https://app.masivo.ai/api/storefront/v1/customers/${customerId}/inapp-messages/${messageId}/events`,
  {
    method: "POST",
    headers: {
      Authorization: `Bearer ${accessToken}`,
      "x-account-id": accountId,
      "Content-Type": "application/json"
    },
    body: JSON.stringify(payload)
  }
);

const clickPayload = {
  action: "clicked",
  metadata: { button_id: "primary" }
};