private void KPA_buttonLoginActionPerformed(java.awt.event.ActionEvent evt) {
        {
            try
                {
                    Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
                    String url="jdbc:sqlserver://localhost:1433;databaseName=KeyProp;user=sa;password=Password1@";
                    Connection con = DriverManager.getConnection(url);
                    String sql = "Select * from Authentication where Username = ? and Password = ?";
                    String usernameString = "Select * from Authentication where Username = Donovan";
                    PreparedStatement pst = con.prepareStatement(sql);
                    PreparedStatement usernamePst = con.prepareStatement(usernameString);
                    pst.setString(1,KPA_tfUsername.getText());
                    pst.setString(2,KPA_pfPassword.getText());
                    usernamePst.setString(3,KPA_tfUsername.getText());
                    ResultSet rs = pst.executeQuery();
                    ResultSet usernameRs = usernamePst.executeQuery();
                    while (usernamePst.getString(3) = 'Test')
                    {
                    if (rs.next())
                        {
                            JOptionPane.showMessageDialog(null, "Username and Password Matched");
                            KeyProp_LaunchPage kplp = new KeyProp_LaunchPage();
                            kplp.setVisible(true);
                            setVisible(false);
                        }
                        else
                            {
                                JOptionPane.showMessageDialog(null, "Username and Password not Correct");
                                KPA_tfUsername.setText("");
                                KPA_pfPassword.setText("");
                                KeyProp_LaunchPage kpl = new KeyProp_LaunchPage();
                                kpl.setVisible(false);
                                setVisible(true);
                            }
                            con.close();
                        }
                        }
                        catch(Exception e)
                        {
                            JOptionPane.showMessageDialog(null, e);
                        }