Enum AuthMode

function onOpen(e) {
  var menu = SpreadsheetApp.getUi().createAddonMenu();
  if (e && e.authMode == ScriptApp.AuthMode.NONE) {
    // Add a normal menu item (works in all authorization modes).
    menu.addItem('Start workflow', 'startWorkflow');
  } else {
    // Add a menu item based on properties (doesn't work in AuthMode.NONE).
    var properties = PropertiesService.getDocumentProperties();
    var workflowStarted = properties.getProperty('workflowStarted');
    if (workflowStarted) {
      menu.addItem('Check workflow status', 'checkWorkflow');
    } else {
      menu.addItem('Start workflow', 'startWorkflow');
    }
    // Record analytics.
    UrlFetchApp.fetch('http://www.example.com/analytics?event=open');
  }
  menu.addToUi();
}