title: getting "This app isn't verified" for Google Sheets script that only touches my sheet
body: <p>I'm working on a Google Sheets script that I'm only intending to access data in the same spreadsheet that the .gs file is associated with.  It seems like I should have permission to run a script in my own spreadsheet, but whenever I run a function, I get a <code>This app isn't verified</code> message.</p>
  
  <p>How do I bypass this?  I've already enabled the Google Sheets API in both Advanced Google Services and the API Console.  Am I wrong in assuming that if I create a spreadsheet and create an add-on that modifies that spreadsheet, that I shouldn't have to authorize it?</p>
  
  <p>Here's the function that's throwing the error:</p>
  
  <pre><code>function getLastRow(){
    ss=SpreadsheetApp.getActiveSpreadsheet();
    var rulesSht=ss.getSheetByName('rules');
    return rulesSht.getLastRow();
  }
  </code></pre>