How do I solve error Unexpected token '=' with AppScript?

Question

I need help with my code. I'm making an appscript to validate some IDs with Google Sheets.

I'm watching this tutorial, I followed the steps and I get this error, I watch the video and it's the same, I don't know what it could be

the error is

SyntaxError: Unexpected token '=' (línea 4, archivo "Código")

function doGet() {

  var template = HtmlService. createTemplateFromFile('index');
  var html = template.evaluate();
  return html;
}

function include( fileName ){
  return HtmlService.createHtmlOutputFromFile( fileName ).getContent();


}

function verificarPassword( form ){

  var ss = SpreadsheetApp.getActiveSpreadsheet();
  var sheetUsuarios = ss.getSheetByName('Usuarios');
  var datausuarios = sheetUsuarios.getUsuarios.getDataRange().getValues();
  var sheetVentas = ss.getSheetByName( 'Ventas' );
  var dataVentas = sheetVentas.getDataRange().getDisplayValue();


  for( var i in datausuarios){
    if( dataUsuarios[i][1] == form.usuario && dataUsuarios[i][2] == form.contrasena ){
      var usuario = {
        headers : dataVentas[0],
        nombre: dataUsuarios[i][0],
        ventas:''
      }

      for( var fila in dataVentas ){

        if( dataVentas[fila][0] == usuario.nombre){

          usuario.ventas = dataVentas[fila];
          break;

        }
        return usuario;
      }


    }
    throw( 'La contrasñea es incorrecta')
  }


}