Custom table plugin

hi, i’m having a trouble in calling a data from my database to be viewed in my admin menu, for now. my data are static
Is there someone can help me to make it dynamic please.
Here is my code:

<?php

if(is_admin())
{
new Marz_Wp_List_Table();
}

/**
* Marz_Wp_List_Table class will create the page to load the table
*/
class Marz_Wp_List_Table
{
/**
* Constructor will create the menu item
*/
public function __construct()
{
add_action( ‘admin_menu’, array($this, ‘add_menu_example_list_table_page’ ));
}

/**
* Menu item will allow us to load the page to display the table
*/
public function add_menu_example_list_table_page()
{
add_menu_page( ‘Agent Users’, ‘Agent Users’, ‘manage_options’, ‘example-list-table.php’, array($this, ‘list_table_page’) );
}

/**
* Display the list table page
*
* @return Void
*/
public function list_table_page()
{
$exampleListTable = new Example_List_Table();
$exampleListTable->prepare_items();
?>
<div class=”wrap”>
<div id=”icon-users” class=”icon32″></div>
<h2>Agent Users</h2>
<?php $exampleListTable->display(); ?>
</div>
<?php
}
}

// WP_List_Table is not loaded automatically so we need to load it in our application
if( ! class_exists( ‘WP_List_Table’ ) ) {
require_once( ABSPATH . ‘wp-admin/includes/class-wp-list-table.php’ );
}

/**
* Create a new table class that will extend the WP_List_Table
*/
class Example_List_Table extends WP_List_Table
{
/**
* Prepare the items for the table to process
*
* @return Void
*/
public function prepare_items()
{
$columns = $this->get_columns();
$hidden = $this->get_hidden_columns();
$sortable = $this->get_sortable_columns();

$data = $this->table_data();
usort( $data, array( &$this, ‘sort_data’ ) );

$perPage = 20;
$currentPage = $this->get_pagenum();
$totalItems = count($data);

$this->set_pagination_args( array(
‘total_items’ => $totalItems,
‘per_page’ => $perPage
) );

$data = array_slice($data,(($currentPage-1)*$perPage),$perPage);

$this->_column_headers = array($columns, $hidden, $sortable);
$this->items = $data;
}

/**
* Override the parent columns method. Defines the columns to use in your listing table
*
* @return Array
*/
public function get_columns()
{
$columns = array(
‘id’ => ‘ID’,
‘name’ => ‘Name’,
’email’ => ‘Email’,
‘role’ => ‘Role’,

);

return $columns;
}

/**
* Define which columns are hidden
*
* @return Array
*/
public function get_hidden_columns()
{
return array();
}

/**
* Define the sortable columns
*
* @return Array
*/
public function get_sortable_columns()
{
return array(‘name’ => array(‘name’, false));
}

/**
* Get the table data
*
* @return Array
*/
private function table_data()
{
$data = array();

$data[] = array(
‘id’ => 1,
‘name’ => ‘Ana’,
’email’ => ‘[email protected]’,
‘role’ => ‘agent’
);

$data[] = array(
‘id’ => 2,
‘name’ => ‘Jonalyn’,
’email’ => ‘[email protected]’,
‘role’ => ‘agent’
);

$data[] = array(
‘id’ => 3,
‘name’ => ‘Customer Service Agent’,
’email’ => ‘[email protected]’,
‘role’ => ‘agent’
);

$data[] = array(
‘id’ => 4,
‘name’ => ‘Isla’,
’email’ => ‘[email protected]’,
‘role’ => ‘agent’
);

$data[] = array(
‘id’ => 5,
‘name’ => ‘Kate’,
’email’ => ‘[email protected]’,
‘role’ => ‘agent’
);

return $data;
}

/**
* Define what data to show on each column of the table
*
* @param Array $item Data
* @param String $column_name – Current column name
*
* @return Mixed
*/
public function column_default( $item, $column_name )
{
switch( $column_name ) {
case ‘id’:
case ‘name’:
case ’email’:
case ‘role’:
return $item[ $column_name ];

default:
return print_r( $item, true ) ;
}
}

/**
* Allows you to sort the data by the variables set in the $_GET
*
* @return Mixed
*/
private function sort_data( $a, $b )
{
// Set defaults
$orderby = ‘name’;
$order = ‘asc’;

// If orderby is set, use this as the sort column
if(!empty($_GET[‘orderby’]))
{
$orderby = $_GET[‘orderby’];
}

// If order is set use this as the order
if(!empty($_GET[‘order’]))
{
$order = $_GET[‘order’];
}

$result = strnatcmp( $a[$orderby], $b[$orderby] );

if($order === ‘asc’)
{
return $result;
}

return -$result;
}
}
?>

and i want it to call the query SELECT SQL_CALC_FOUND_ROWS ID, user_nicename, user_email, display_name FROM wp_pprgu2_users WHERE user_nicename LIKE ‘cs%’ ;

Thanks for the help in advance.

https://www.ads-software.com/plugins/custom-database-tables/