GistCloudFunction.js

const functions = require("firebase-functions");
const axios = require("axios");

exports.sendWelcomeMessage = functions.firestore
    .document("users/{userId}")
    .onCreate(async (user, context) => {
      const userData = user.data();
      await sendGistMessage("welcome", "bottom", context.params.userId, userData);
    });

const sendGistMessage = async (messageId, position, userId, properties) => {
  const queue = axios.create({
    baseURL: "https://queue.api.gist.build",
    headers: {
      "Content-Type": "application/json",
      "X-Bourbon-Organization-Id": "organization-id",
      "X-Gist-Service-Key": "service-key",
    },
  });

  properties.gist = {
    "position": position,
  };

  const message = {
    "messageId": messageId,
    "userToken": userId,
    "properties": properties,
    "priority": 1,
  };

  await queue.post("/api/v1/messages", message);
};