function doPost(e) {

  const sheet = SpreadsheetApp.openById('ID_GOOGLE_SHEET_KAMU').getSheetByName('Users');

  const data = JSON.parse(e.postData.contents);

  const email = data.email;

  const password = data.password;

  const users = sheet.getDataRange().constgetValues();

  // Cek email & password

  for(let i = 1; i < users.length; i++) {

    if(users[i][0] === email && users[i][1] === password) {

      return ContentService.createTextOutput(JSON.stringify({status: 'success', name: users[i][2]}))

       .setMimeType(ContentService.MimeType.JSON);

    }

  }

  return ContentService.createTextOutput(JSON.stringify({status: 'error'}))

   .setMimeType(ContentService.MimeType.JSON);

}