[SOLVED] Google Script gmail scam?

I'm a little worried and in a hurry and I'm not sure if this is the right place to ask this, but I literally have no idea where else to ask. Long story short, I wanted to clear my gmail account from spam and found the following link while searching for a way to do this: https://www.labnol.org/internet/gmail-unsubscribe/28806/ Like a complete idiot, I followed the instructions blindly without suspecting anything. After completing the steps, nothing really happened (the spreadsheet wasn't filling) so I stopped the script and removed it from my google accounts permissions and started inspecting the code that was used. It consists of three files, the google script:

function getConfig() {
  var params = {
    label:doProperty_("LABEL") || "Unsubscribe"
  };
  return params;
}

function config_() {
  var html = HtmlService.createHtmlOutputFromFile('config')
  .setTitle("Gmail Unsubscriber")
  .setWidth(300).setHeight(200).setSandboxMode(HtmlService.SandboxMode.IFRAME);
  var ss = SpreadsheetApp.getActive();
  ss.show(html);
}

function help_() {
  var html = HtmlService.createHtmlOutputFromFile('help')
  .setTitle("Google Scripts Support")
  .setWidth(350).setHeight(120);
  var ss = SpreadsheetApp.getActive();
  ss.show(html);
}

function createLabel_(name) {

  var label = GmailApp.getUserLabelByName(name);

  if (!label) {
    label = GmailApp.createLabel(name);
  }

  return label;

}

function log_(status, subject, view, from, link) {
  var ss = SpreadsheetApp.getActive();
  ss.getActiveSheet().appendRow([status, subject, view, from, link]);
}

function init_() {
  Browser.msgBox("The Unsubscriber was initialized. Please select the Start option from the Gmail menu to activate.");
  return;
}


function onOpen() {

  var menu = [     
    {name: "Configure", functionName: "config_"},
    null,
    {name: "☎ Help & Support",functionName: "help_"},
    {name: "✖ Stop (Uninstall)",  functionName: "stop_"},
    null
  ];  

  SpreadsheetApp.getActiveSpreadsheet().addMenu("➪ Gmail Unsubscriber", menu);

}

function stop_(e) {

  var triggers = ScriptApp.getProjectTriggers();

  for(var i in triggers) {
    ScriptApp.deleteTrigger(triggers[i]);
  }

  if (!e) {
    Browser.msgBox("The Gmail Unsubscriber has been disabled. You can restart it anytime later."); 
  }  
}


function doProperty_(key, value) {

  var properties = PropertiesService.getUserProperties();

  if (value) {
    properties.setProperty(key, value);
  } else {
    return properties.getProperty(key);
  }

}

function doGmail() {

  try {

    var label = doProperty_("LABEL") || "Unsubscribe";

    var threads = GmailApp.search("label:" + label);

    var gmail = createLabel_(label);

    var url, urls, message, raw, body, formula, status;

    var hyperlink = '=HYPERLINK("#LINK#", "View")';

    var hrefs = new RegExp(/<a[^>]*href=["'](https?:\/\/[^"']+)["'][^>]*>(.*?)<\/a>/gi);

    for (var t in threads)  {

      url = "";

      status = "Could not unsubscribe";

      message = threads[t].getMessages()[0];

      threads[t].removeLabel(gmail);

      raw = message.getRawContent();

      urls = raw.match(/^list\-unsubscribe:(.|\r\n\s)+<(https?:\/\/[^>]+)>/im);

      if (urls) {
        url = urls[2];
        status = "Unsubscribed via header";
      } else {
        body = message.getBody().replace(/\s/g, "");
        while ( (url === "") && (urls = hrefs.exec(body)) ) {
          if (urls[1].match(/unsubscribe|optout|opt\-out|remove/i) || urls[2].match(/unsubscribe|optout|opt\-out|remove/i)) {
            url = urls[1];
            status = "Unsubscribed via link";
          }
        }
      }

      if (url === "") {
        urls = raw.match(/^list\-unsubscribe:(.|\r\n\s)+<mailto:([^>]+)>/im);
        if (urls) {
          url = parseEmail_(urls[2]);
          var subject = "Unsubscribe";
          GmailApp.sendEmail(url, subject, subject);
          status = "Unsubscribed via email";
        }
      }

      if (status.match(/unsubscribed/i)) {
        UrlFetchApp.fetch(url, {muteHttpExceptions: true});
      }

      formula = hyperlink.replace("#LINK", threads[t].getPermalink());

      log_( status, message.getSubject(), formula, message.getFrom(), url );

    }
  } catch (e) {Logger.log(e.toString())}

}


function saveConfig(params) {

  try {

    doProperty_("LABEL", params.label);

    stop_(true);

    ScriptApp.newTrigger('doGmail')
    .timeBased().everyMinutes(15).create();

    return "The Gmail unsubscriber is now active. You can apply the Gmail label " + params.label + " to any email and you'll be unsubscribed in 15 minutes. Please close this window.";    

  } catch (e) {

    return "ERROR: " + e.toString();

  }

}

function parseEmail_(email) {
  var result = email.trim().split("?");
  return result[0];
}

And two other .html files called config.html:

<link rel="stylesheet" href="https://ssl.gstatic.com/docs/script/css/add-ons.css">

<script>

  function closeWindow() {
    google.script.host.close();
  }

  function showError(error) {
    document.getElementById("error").innerHTML = error;
  }

  function showConfig(params) {

    if (params.label !== "") 
    document.getElementById("label").value = params.label;

    return;

  }

  function validate() {

      var label = document.getElementById("label").value;

      if (label.trim() === "") {
          showError("Please enter a Gmail label name..");
          return;
      } else {
          showError("Saving configuration, please wait..");
          var params = {
              label: label
          };
          google.script.run.withSuccessHandler(showError).saveConfig(params);
      }
  }

</script>

<form>
    <div class="form-group block">
        <p style="margin-bottom:4px;">Enter Gmail Label Name:</p>
        <input type="text" id="label" name="label" placeholder="Your email address.." style="width: 250px;" />
    </div>


    <p>
        <input class="blue" type="button" value="Save configuration" onclick="validate()" />
        <input class="green" type="button" value="Close window" onclick="google.script.host.close()" />
    </p>

    <p class="error" id="error"></p>

</form>

<script>
  google.script.run.withSuccessHandler(showConfig).getConfig();  
</script>

And lastly help.html:

<head>
<link rel="stylesheet" href="https://ssl.gstatic.com/docs/script/css/add-ons.css">
<base target="_blank">
</head>
<div class="block">


  <p>If you are need help with the program, please refer to the <a href="https://www.labnol.org/internet/gmail-unsubscribe/28806/">online tutorial</a>. For support and customization, please submit your requirements at <strong><a href="https://ctrlq.org">ctrlq.org</a></strong>.</p>
</div>

<div class="block">
  <a class="button blue" href="mailto:amit@labnol.org" style="width:120px;">amit@labnol.org</a>
  <a class="button green" href="https://twitter.com/labnol" style="width:120px;margin-right:10px">Tweet @labnol</a>  
<input class="red" type="button" value="Close" onclick="google.script.host.close()" />
</div>

Is there any way that my account could be in any danger?