Need help in data parameterization

I have a scenario like below and need assist on this -

1. Need to login to application.

2. then do the parameterization from excel sheet.

3. log out from the application.

I'm able to perform this with multiple log in and log out but can we perform with single login instance ?

Below code is working with multiple log in.

public class test {

       @Test(dataProvider="getData")

       public void demo(String CDM_Code, String CDM_Name) throws Exception{

System.setProperty("webdriver.chrome.driver", "C:\\Selenium\\Driver\\ChromeDriver.exe");

              WebDriver cd=new ChromeDriver();

              //cd.get("https://ppds-sit.int.thomsonreuters.com/PPDSWeb/Login.aspx");

              cd.get("http://ppds-sit.int.thomsonreuters.com/PPDSWeb/Login.aspx");

              cd.manage().window().maximize();

              cd.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);

              cd.findElement(By.xpath("//*[@id='ctl00_loginControls_txtUserName']")).sendKeys("test.developer");

              cd.findElement(By.xpath("//*[@id='ctl00_loginControls_txtPassword']")).sendKeys("Password3");

              cd.findElement(By.xpath("//*[@id='ctl00_loginControls_btnSubmit']")).click();

              WebElement WE1=cd.findElement(By.xpath("//*[@id='ctl02_MasterMenu-menuItem005']"));

              Actions act= new Actions(cd);

              act.click(WE1).build().perform();

              cd.findElement(By.xpath("//*[@id='ctl02_MasterMenu-menuItem005-subMenu-menuItem015']")).click();

              do{

                     cd.findElement(By.xpath("//*[@id='btn_ContentDeliverysMaint_New']")).click();

              cd.findElement(By.xpath("//*[@id='txtContentDeliveryCode']")).sendKeys(CDM_Code);

              cd.findElement(By.xpath("//*[@id='txtContentDeliveryName']")).sendKeys(CDM_Name);

              cd.findElement(By.xpath("//*[@id='btn_ContentDeliverysMaint_Apply']")).click();

              cd.findElement(By.xpath("//*[@id='dlgControl_btnOK']")).click();

              cd.findElement(By.xpath("//*[@id='dlgControl_btnOK']")).click();

              Thread.sleep(4000);

              }while(CDM_Code !=" ");

              cd.close();

              }

       @DataProvider()

       public Object[][]getData(){

       //Total rows in the sheet

       Xls_Reader xls=new Xls_Reader("C:\\Selenium\\Files\\Content Delivery Model.xlsx");

       int rows=xls.getRowCount("CDM");

       System.out.println(rows);

       //Total column in the sheet

       int cols=xls.getColumnCount("CDM");

       System.out.println(cols);

       Object[][] data=new Object[rows-1][cols];

       int count=0; 

       for(int i=2;i<=rows;i++){ 

              for (int j=0;j<=cols-1;j++){

                     data[count][j]= xls.getCellData("CDM", j, i);

                     System.out.println(data[count][j]);

              }

              count++;     

}

       return data; 

       }

}