Giúp mình fix lỗi DataProvider trong TestNG, không thể pass 3/4 testcase còn lại

import java.io.File;
import java.util.concurrent.TimeUnit;
import org.openqa.selenium.Alert;
import org.openqa.selenium.By;
import org.openqa.selenium.NoAlertPresentException;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.testng.Assert;
import org.testng.annotations.AfterTest;
import org.testng.annotations.BeforeTest;
import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;
public class TestScript03 {

	private static WebDriver driver;

	@DataProvider(name = "Authentication")
	public static Object[][] credentials() {
		return new Object[][] { { "mngr59425", "zytYtan" }, { "invalid", "valid" }, { "valid", "invalid" },
				{ "invalid", "invalid" } };
	}

	@BeforeTest
	public void setUp() {

		System.setProperty("webdriver.chrome.driver", "G:\TestNG\selenium\chromedriver.exe");

		driver = new ChromeDriver();

		driver.manage().timeouts().implicitlyWait(Util.WAIT_TIME, TimeUnit.SECONDS);

		driver.get(Util.BASE_URL);

	}

	@Test(dataProvider = "Authentication")
	public void TestScript03(String username, String password) throws Exception {

		String alertText, actualTitle;

		driver.findElement(By.name("uid")).clear();

		driver.findElement(By.name("uid")).sendKeys(username);

		driver.findElement(By.name("password")).clear();

		driver.findElement(By.name("password")).sendKeys(password);

		driver.findElement(By.name("btnLogin")).click();

		try {

			Alert alt = driver.switchTo().alert();
			alertText = alt.getText(); // get content of the Alter Message
			Assert.assertEquals(alertText, Util.EXPECT_ERROR);
		} catch (NoAlertPresentException Ex) {
			actualTitle = driver.getTitle();
			// On Successful login compare Actual Page Title with Expected Title
			Assert.assertEquals(actualTitle, Util.EXPECT_TITLE);
		}
	}
	
	@AfterTest
	public void terminal(){
		driver.quit();
	}
}

import java.io.File;
public class Util {

	public static final int WAIT_TIME = 30; // Delay time to wait the website
	// launch completely
	public static final String BASE_URL = "http://www.demo.guru99.com/V4/";

	// Expected output
	public static final String EXPECT_TITLE = "Guru99 Bank Manager HomePage";
	
	public static final String EXPECT_ERROR = "User or Password is not valid";
	
}