WP_List_Table Checkbox Column

Hi

I am trying to create a custom admin page with WP_List_Table Class. However my checkboxs are not activated. Seems styles or java script issue. I am new to WordPress. Appreciate your help to fix this issue.

This is my code to create a short code.

if( ! class_exists( 'WP_List_Table' ) ) {
    require_once( ABSPATH . 'wp-admin/includes/screen.php' );
    require_once( ABSPATH . 'wp-admin/includes/class-wp-screen.php' );
    require_once( ABSPATH . 'wp-admin/includes/class-wp-list-table.php' );
    require_once( ABSPATH . 'wp-admin/includes/template.php' );
}

class User_List_Table extends WP_List_Table {
    // Contents of this function will execute when the blogger
    public $found_data = array();
       
    function __construct(){
        global $status, $page;

        parent::__construct( array(
            'singular'  => __( 'user', 'mylisttable' ),     //singular name of the listed records
            'plural'    => __( 'users', 'mylisttable' ),   //plural name of the listed records
            'ajax'      => false        //does this table support ajax?
        ) );

        add_action( 'admin_head', array( &$this, 'admin_header' ) );  
    }
  
    function get_data($args){
        //$args = array('role' => 'um_donee');
    $query = new WP_User_Query($args);
      $results = $query->get_results();
        $user_data = [];
        $i = 0;
        foreach ($results as $item) {
            $user_data[$i]["id"] = $item->ID;
            $user_data[$i]["user"] = '<a href="'. get_author_posts_url($item->ID) .'">'. get_avatar($item->user_email, 30) .'</a>';
            $user_data[$i]["display_name"] = $item->display_name;
            $user_data[$i]["user_email"] = $item->user_email;
            $user_data[$i]["description"] = get_user_meta($item->ID, 'description', true );
            $user_data[$i]["account_status"] = get_user_meta($item->ID, 'account_status', true );
            $i++;
        }
    return $user_data;
    }
    
    function admin_header() {
        $page = ( isset($_GET['page'] ) ) ? esc_attr( $_GET['page'] ) : false;
        if( 'my_list_test' != $page )
        return;
        echo '<style type="text/css">';
        echo '.wp-list-table .column-id { width: 5%; }';
        echo '.wp-list-table .column-user { width: 40%; }';
        echo '.wp-list-table .column-display_name { width: 35%; }';
        echo '.wp-list-table .column-email { width: 20%;}';
        echo '</style>';
    }

    function no_items() {
        _e( 'No users found !.' );
    }
  
    function column_default( $item, $column_name ) {
        switch( $column_name ) { 
            case 'user':
            case 'display_name':
            case 'user_email':
            case 'description':
            case 'account_status':
                return $item[ $column_name ];
            default:
                return print_r( $item, true ) ; //Show the whole array for troubleshooting purposes
        }
    }

    function get_sortable_columns() {
          $sortable_columns = array(
            'display_name'  => array('display_name',false),
            'user_email' => array('user_email',false),
            'account_status'   => array('account_status',false)
          );
          return $sortable_columns;
    }

    function get_columns(){
        $columns = array(
            'cb'        => '<input type="checkbox" />',
            'user' => __( 'User', 'mylisttable' ),
            'display_name'    => __( 'Display Name', 'mylisttable' ),
            'user_email'      => __( 'Email', 'mylisttable' ),
            'description'      => __( 'Summary', 'mylisttable' ),
            'account_status'      => __( 'Account Status', 'mylisttable' )
        );
         return $columns;
    }
    
    function usort_reorder( $a, $b ) {
      // If no sort, default to title
      $orderby = ( ! empty( $_GET['orderby'] ) ) ? $_GET['orderby'] : 'user';
      // If no order, default to asc
      $order = ( ! empty($_GET['order'] ) ) ? $_GET['order'] : 'asc';
      // Determine sort order
      $result = strcmp( $a[$orderby], $b[$orderby] );
      // Send final sort direction to usort
      return ( $order === 'asc' ) ? $result : -$result;
    }
   
    public function get_bulk_actions() {
      $actions = array(
        'delete'    => 'Delete',
        'edit' => 'Edit'
      );
      return $actions;
    }
  
    function column_cb($item) {
        return sprintf(
            '<input type="checkbox" name="users[]" value="%s"/>',
            $item['id']
        );    
    }
        
    function prepare_items() {
      $args = array( 'role' => 'um_donee' );
      $columns  = $this->get_columns();
      $hidden   = array();
      $sortable = $this->get_sortable_columns();
      $primary = 'cb';
      $user_data = $this->get_data($args);
      $this->_column_headers = array( $columns, $hidden, $sortable, $primary );
      usort( $user_data, array( &$this, 'usort_reorder' ) );

      $per_page = 5;
      $current_page = $this->get_pagenum();
      $total_items = count( $user_data );

      // only ncessary because we have sample data
      $this->found_data = array_slice( $user_data,( ( $current_page-1 )* $per_page ), $per_page );

      $this->set_pagination_args( array(
        'total_items' => $total_items,                  //WE have to calculate the total number of items
        'per_page'    => $per_page                     //WE have to determine how many items to show on a page
      ) );
      $this->items = $this->found_data;
    }
  
}

function list_donees($atts) {
  $donee_list = new User_List_Table();
  ob_start();
  echo '</pre><div class="wrap">';
  ?>
       <form method="post" action>
          <?php
           	$donee_list->prepare_items(); 
           	$donee_list->display(); 
   echo '</form></div>';
  return ob_get_clean();
}

add_shortcode('list_users', 'list_donees');