Deleting Google Analytics cookies on server

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• How would you capture a discount that covers the cost of taxes with GA4 Purchase parameters?

  Would I add a data layer variable for the purchase event outside of the items array? This is Google's recommendation for purchase events. I want to add a coupon code with a discount that covers the entire cost including taxes. This is what google has in their doc:

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  I want to create a cart that gives the user for free. Or rather a $0 cart value. Would I add the coupon discount ($4.90 = value + tax) for the whole cart like this:

  dataLayer.push({      
  event: "purchase",
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            transaction_id: "T_12345",
            affiliation: "Google Merchandise Store",
            value: 0,
            tax: 4.90,
            shipping: 0,
            currency: "USD",
            coupon: "SUMMER_SALE",
            discount: 4.90,
            items: [
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              item_id: "SKU_12345",
              item_name: "Stan and Friends Tee",
              affiliation: "Google Merchandise Store",
              coupon: "SUMMER_FUN",
              currency: "USD",
              discount: 9.99,
              index: 0,
              item_brand: "Google",
              item_category: "Apparel",
              item_category2: "Adult",
              item_category3: "Shirts",
              item_category4: "Crew",
              item_category5: "Short sleeve",
              item_list_id: "related_products",
              item_list_name: "Related Products",
              item_variant: "green",
              location_id: "L_12345",
              price: 9.99,
              quantity: 1
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        }
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  Or would the discount amount including tax ($14.69 = intended discount for product + cost of tax) also be included in the discount for the item in the items array.

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  event: "purchase",
        ecommerce: {
            transaction_id: "T_12345",
            affiliation: "Google Merchandise Store",
            value: 0,
            tax: 4.90,
            shipping: 0,
            currency: "USD",
            coupon: "SUMMER_SALE",
            discount: 4.90,
            items: [
             {
              item_id: "SKU_12345",
              item_name: "Stan and Friends Tee",
              affiliation: "Google Merchandise Store",
              coupon: "SUMMER_FUN",
              currency: "USD",
              discount: 14.69,
              index: 0,
              item_brand: "Google",
              item_category: "Apparel",
              item_category2: "Adult",
              item_category3: "Shirts",
              item_category4: "Crew",
              item_category5: "Short sleeve",
              item_list_id: "related_products",
              item_list_name: "Related Products",
              item_variant: "green",
              location_id: "L_12345",
              price: 9.99,
              quantity: 1
            }]
        }
      });
  

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  I'm using this script to push play/pause/progress of vimeo videos on our website. I'd like to push another event "load" when video is loaded on page. I've tried adding a part to send info to the data layer when the video is ready as such:

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  <!--
  Google Analytics Tag Manager (V2) custom HTML tag for Vimeo video tracking
  
  Copyright 2016, Cardinal Path, Inc.
  
  Original author: Bill Tripple <btripple@cardinalpath.com>
  Revised by: Bogdan Bistriceanu <bbistriceanu@cardinalpath.com>
  
  Version 2.0
  -->
  
  <script>
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  var videoLabels=[];
  var lastP=[];
  
  //we declare variables that will hold information about the video being played
  var _playerTitle = {}, _playerAuthor = {}, _playerAuthorURL = {}, _playerUploadDate = {}; 
  
  try{
      init();
  }
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      dataLayer.push({
          'event': 'gtm.error',
          'errorMessage': e.message,
          'tag': 'CP - UA - Vimeo Video Listener'
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  function init(){
      try{
          var player=document.getElementsByTagName("iframe");
          for (i = 0; i < player.length; ++i) {
              var url=player[i].getAttribute("src");
  
              if(/player\.vimeo\.com\/video/.test(url)){ // vimeo iframe found
                  if(!player[i].hasAttribute("id")){ // id attribute missing
                      player[i].setAttribute("id","vimeo_id_"+i); // add id attribute
                  }
                  var urlUpdated=false;
                  if(!/api=/.test(url)){ // check to see if api parameter is in src attribute
                      url=updateUrl(url,"api",1);
                      urlUpdated=true;
                  }
  
                  if(!/player_id=/.test(url)){ // check if player_id is in src attribute
                      url=updateUrl(url,"player_id",player[i].getAttribute("id"));
                      urlUpdated=true;
                  }
                  if(urlUpdated){ // repopulate src attribute with added parameters
                      player[i].setAttribute("src",url)
                  }
                  videoLabels[player[i].getAttribute("id")]=player[i].getAttribute("src"); // id to label dictionary
              }
          }
  
          // Listen for messages from the player
          if (window.addEventListener){
              window.addEventListener('message', onMessageReceived, false);
          }
          else {
              window.attachEvent('onmessage', onMessageReceived, false);
          }
      }
      catch(err){
      }
  }
  
  function updateUrl(url,param,value){
      try{
          return url+((/\?/.test(url)) ? "&" : "?")+param+"="+value;  
      }
      catch(err){
      }
  }
  
  // Handle messages received from the player
  function onMessageReceived(e) {
      try{
          var data = e.data;
          
          if(typeof data === "string"){
              data = JSON.parse(data);
          }
          
          switch (data.event) {
              case 'ready':
                  onReady(data);
                  break;
              case 'play':
                  onPlay(data);
                  break;
              case 'pause':
                  onPause(data);
                  break;
              case 'playProgress':
                  onPlayProgress(data);
                  break;
          }
      }
      catch(err){
      }
  }
  
  // Helper function for sending a message to the player
  function post(action, value) {
      try{
          var data = {
            method: action
          };
  
          if (value) {
              data.value = value;
          }
  
          var message = JSON.stringify(data);
          var player = document.getElementsByTagName("iframe");
          var url;
          var prot;
  
  
          for (i = 0; i < player.length; ++i) {
          url=player[i].getAttribute("src");
  
              if(/player\.vimeo\.com\/video/.test(url)){
                  // Check if protocol exists
                  prot = player[i].getAttribute('src').split('?')[0].split('//')[0];
  
                  // If protocol doesn't exist, then need to append to "url"
                  if (!prot){
                      url="https:" + player[i].getAttribute("src").split('?')[0];
                  }
              player[i].contentWindow.postMessage(data, url);
              }
          }
      }
      catch(err){
      }
  }
  
  function getLabel(id){
      try{
          return videoLabels[id].split('?')[0].split('/').pop();
      }
      catch(err){
      }
  }
  
  //our function that will use the Vimeo oEmbed API to retrieve additional information about the video
  function getVimeoInfo(url, callback) {
              
      var script = document.createElement('script');
          script.type = 'text/javascript';
          script.src = url;
                  
          document.getElementsByTagName('body')[0].appendChild(script);
  }
  
  //the callback function which takes the data received from the Vimeo oEmbed API and places it into the corresponding objectes
  function vimeoCallback(e){
      //console.log(e);
      _playerTitle[e['video_id']] = e['title'];
      _playerAuthor[e['video_id']] = e['author_name']
      _playerAuthorURL[e['video_id']] = e['author_url']
      _playerUploadDate[e['video_id']] = e['upload_date']
  }
  
  function onReady(data) {
      try{
          //execute our function which queries the Vimeo oEmbed API once the embedded videos are "ready"
          getVimeoInfo("https://www.vimeo.com/api/oembed.json?url=https://vimeo.com/"+getLabel(data.player_id)+"&callback=vimeoCallback", vimeoCallback);
  
          post('addEventListener', 'play');
          post('addEventListener', 'pause');
          post('addEventListener', 'finish');
          post('addEventListener', 'playProgress');
      }
      catch(err){
      }
  }
  
  function onPlay(data){
      try{
          dataLayer.push({
              event: "vimeo",
              eventCategory: "vimeo",
              eventAction: "vimeo play",
              eventLabel: _playerTitle[getLabel(data.player_id)].toLowerCase() + " - " + getLabel(data.player_id),
              vimeo_playerID: getLabel(data.player_id),
              vimeo_playerTitle: _playerTitle[getLabel(data.player_id)].toLowerCase(),
              vimeo_playerAuthor: _playerAuthor[getLabel(data.player_id)].toLowerCase(),
              vimeo_playerAuthorURL: _playerAuthorURL[getLabel(data.player_id)].toLowerCase(),
              vimeo_playerUploadDate: _playerUploadDate[getLabel(data.player_id)],
              nonInteractive: true
          });
      }
      catch(err){
      }
  }
  
  function onPause(data){
      try{
          dataLayer.push({
              event: "vimeo",
              eventCategory: "vimeo",
              eventAction: "vimeo video pause",
              eventLabel: _playerTitle[getLabel(data.player_id)].toLowerCase() + " - " + getLabel(data.player_id),
              vimeo_playerID: getLabel(data.player_id),
              vimeo_playerTitle: _playerTitle[getLabel(data.player_id)].toLowerCase(),
              vimeo_playerAuthor: _playerAuthor[getLabel(data.player_id)].toLowerCase(),
              vimeo_playerAuthorURL: _playerAuthorURL[getLabel(data.player_id)].toLowerCase(),
              vimeo_playerUploadDate: _playerUploadDate[getLabel(data.player_id)],
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          });
      }
      catch(err){
      }
  }
  
  // Track progress: 25%, 50%, 75%, 100%
  function onPlayProgress(data) {
      try{
          var t = data.data.duration - data.data.seconds <= 1.5 ? 1 : (Math.floor(data.data.seconds / data.data.duration * 4) / 4).toFixed(2); 
          if (!lastP[data.player_id] || t > lastP[data.player_id]) {
              lastP[data.player_id]=t;
              if (parseFloat(t) != 0){
                  dataLayer.push({
                      event: "vimeo",
                      eventCategory: "vimeo",
                      eventAction: "vimeo video " +t*100+ "% Complete",
                      eventLabel: _playerTitle[getLabel(data.player_id)].toLowerCase() + " - " + getLabel(data.player_id),
                      vimeo_playerID: getLabel(data.player_id),
                      vimeo_playerTitle: _playerTitle[getLabel(data.player_id)].toLowerCase(),
                      vimeo_playerAuthor: _playerAuthor[getLabel(data.player_id)].toLowerCase(),
                      vimeo_playerAuthorURL: _playerAuthorURL[getLabel(data.player_id)].toLowerCase(),
                      vimeo_playerUploadDate: _playerUploadDate[getLabel(data.player_id)],
                      nonInteractive: true
                  })
              }
          }
      }
      catch(err){
      }
  }
  </script>
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  2. Creating item-level custom dimension to test if it will be passed to GA4 DebugView

  However, due to fact that GA requires 24h to make conclusions i decided to ask here for any sugestions why it is not working and what else may i test.
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  This is the code that is implemented in GTM. https://gist.github.com/alfhh/5ab99138e40800283cecd279037e5f06
• Keeping user properties between events (Google Tag Manager, Google Analytics 4)

  I have a question about user properties in Google Analytics 4.

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