Get Instagram Followers

instagram.js

const random_wait_time = (waitTime = 300) => new Promise((resolve, reject) => {
  setTimeout(() => {
    return resolve();
  }, Math.random() * waitTime);
});

const get_followers = async(userId, userFollowerCount) => {
  let userFollowers = [],
    batchCount = 20,
    actuallyFetched = 20,
    url = `https://www.instagram.com/graphql/query/?query_hash=c76146de99bb02f6415203be841dd25a&variables={"id":"${userId}","include_reel":true,"fetch_mutual":true,"first":"${batchCount}"}`;
  while (userFollowerCount > 0) {
    const followersResponse = await fetch(url)
      .then(res => res.json())
      .then(res => {
        const nodeIds = [];
        for (const node of res.data.user.edge_followed_by.edges) {
          nodeIds.push(node.node.id);
        }
        actuallyFetched = nodeIds.length;
        return {
          edges: nodeIds,
          endCursor: res.data.user.edge_followed_by.page_info.end_cursor
        };
      }).catch(err => {
        userFollowerCount = -1;
        return {
          edges: []
        };
      });
    await random_wait_time();
    userFollowers = [...userFollowers, ...followersResponse.edges];
    userFollowerCount -= actuallyFetched;
    url = `https://www.instagram.com/graphql/query/?query_hash=c76146de99bb02f6415203be841dd25a&variables={"id":"${userId}","include_reel":true,"fetch_mutual":true,"first":${batchCount},"after":"${followersResponse.endCursor}"}`;
  }
  console.log(userFollowers);
  return userFollowers;
};