So I’ll take out pieces as this is more done in a test case then an keyword. You need at least these imports:
import com.kms.katalon.core.testdata.TestDataFactory
import com.kms.katalon.core.testdata.reader.ExcelFactory
set up your data:
nameForYourData = ExcelFactory.getExcelDataWithDefaultSheet('C:FILEPATHFOREXCELLFILE\\excelFileName.xlsx', 'SHEETNAMEHERE', true)
then pull your values into variables, many ways to get column or row such as variable you set in advance or randomly generate a number etc.
'-------------SHEET-VALUES---------------'
String userName = nameForYourData .getValue(3, 1)
String userPassword= nameForYourData .getValue(4, 1)