How to restart browser after tes when using data providers

Im currently using a Data Provider to enter numerous different users, but when the tests ends then the previous user is still logged in, how do make the bowser reset after each run? Heres my code:

public class login_from_login_page extends ConditionsWebDriverFactory {

public static final int TEST_CASE_PASSED_STATUS = 1;
public static final int TEST_CASE_FAILED_STATUS = 5;


@Test(dataProviderClass = Data.DataProviders.class, dataProvider = "customer")
public void LoginActionTest (String pass, String email, String user) throws Exception{

        Header header = new Header();
        header.guest_select_login();
        Pages.Login login = new Pages.Login();
        login.LoginAction(pass, email, user);


        //TestRail.addResultForTestCase("16870",TEST_CASE_PASSED_STATUS," ");
        //TestRail.addResultForTestCase("16874",TEST_CASE_PASSED_STATUS," ");
        //TestRail.addResultForTestCase("17199",TEST_CASE_PASSED_STATUS," ");


}

}