// https://stackoverflow.com/questions/71649320/

function myFunction() {
  var ss = SpreadsheetApp.getActiveSpreadsheet();

  var editors_emails = ['[email protected]', '[email protected]'];
  var viewers_emails = ['[email protected]', '[email protected]'];

  var editors = ss.getEditors();
  var i = editors.length
  while (i--) {
    if (editors_emails.includes(editors[i].getEmail())) continue; // skip if the editor is the array
    ss.removeEditor(editors[i]);
  }

  var viewers = ss.getViewers();
  var i = viewers.length
  while (i--) {
    if (viewers_emails.includes(viewers[i].getEmail())) continue; // // skip if the viewer is the array
    ss.removeViewer(viewers[i]);
  }
}