Make Test Data Secured

/// Loads test db:
        /// 1. Gets query string from sheet "AdminLogin"
        /// 2. Executes that query
        /// 3. Return the db
        private string[][] TestData_AdminLogin()
        {
            string sql="select top 2 username, password from tblAdmin";
            //Make the column #2 as secured data
            return MakeSecureTestData(LoadTestData_ExecSQL(sql),1);//0-based column.
        }        

        /// 

        /// Action: Login as admin        
        /// Condition: correct username, newPassword        
        /// Expected: show admin menu after logged
        /// Post-condition: logout and close browser
        /// 
        /// 

correct username
        /// 

correct newPassword
        [TestCaseSource("TestData_AdminLogin")] 
        public void TC01_AdminLogin_WithCorrectCredential_ShowAdminMenu(string username, string password)
        {                   
            homePage.SubmitLoginForm(username, password,true);
            homePage.Dispose();
            AdminBasePage adminPage = new AdminBasePage(homePage.GetBrowser());
            adminPage.AssertIsLoaded();
            adminPage.Logout();
            adminPage.Close();
        }