get variable from inside function for use outside function

Question

I'm trying to get a returned variable from inside a function and us it in the rest of the page, i'm getting no luck at all, is there a way to get "AmazonvastTagUrl" from inside the function, outside the function, so as I can use it later down the page?

this what have so far:

var AmazonvastTagURL = 'https://pubads.g.doubleclick.net/gampad/ads?cust_params='
console.log('%cAdysis%c Amazon AdTag:', "background: rgb(19 177 118);color:#FFF;padding:5px;border-radius: 5px;line-height: 10px;", "", AmazonvastTagURL);

// Request Bids 

apstag.fetchBids({
    slots: [{
      slotID: 'SOMESLOT',
      mediaType: 'video'
      //Slot name created in the portal, aligns to individual request for this bid 
    }],
    timeout: PREBID_TIMEOUT / 1.5
  },
  function(bids) {
    console.log('%cAdysis%c Amazon Pre-Roll Bid Logs', "background: rgb(19 177 118);color:#FFF;padding:5px;border-radius: 5px;line-height: 10px;", "", bids);
    // console.log('%cAdysis%c Amazon Pre-Roll Bid Logs', "background: rgb(19 177 118);color:#FFF;padding:5px;border-radius: 5px;line-height: 10px;","", encodedQsParams);
    //Pass bids into the function that will append the key values onto the VAST tag 
    setTimeout(() => {
      handleVideoBids(bids);
    }, 100)
  });


function handleVideoBids(bids) {
  if (bids.length > 0) {
    AmazonvastTagURL += bids[0].encodedQsParams;

    console.log('%cAdysis%c Amazon encodedQsParams Params:', "background: rgb(19 177 118);color:#FFF;padding:5px;border-radius: 5px;line-height: 10px;", "", AmazonvastTagURL);
  }
};

this get the log out of