Update index.js

[VarunBatraIT]

Hi

this.cache is bind to a cluster, This means, if this.cache is updated on different cluster, key may not present in other clusters and hence returns an empty response. Consider I have two clusters, A and B

A = B = OLD
A sets the new data and updates itself as A = NEW but B doesn't update since despite it is reading from file, it relying on this.cache key exist or not.

  if (Fs.existsSync(cacheFile)) {
    data = Fs.readFileSync(cacheFile);
    data = JSON.parse(data);
    console.log("LOGGED IN CACHEMAN")
    console.log(data) //Despite there is a data here.
  } else {
    return fn(null, null);
  }

  if (!this.cache[key]) {
    //returns just because this.cache is bind to a cluster.
    console.log("EMPTY CACHE OBJECT")
    return fn(null, null);
  }