WP_Users_List_Table::prepare_items

	public function prepare_items() {
		global $role, $usersearch;

		$usersearch = isset( $_REQUEST['s'] ) ? wp_unslash( trim( $_REQUEST['s'] ) ) : '';

		$role = isset( $_REQUEST['role'] ) ? $_REQUEST['role'] : '';

		$per_page       = ( $this->is_site_users ) ? 'site_users_network_per_page' : 'users_per_page';
		$users_per_page = $this->get_items_per_page( $per_page );

		$paged = $this->get_pagenum();

		if ( 'none' === $role ) {
			$args = array(
				'number'  => $users_per_page,
				'offset'  => ( $paged - 1 ) * $users_per_page,
				'include' => wp_get_users_with_no_role( $this->site_id ),
				'search'  => $usersearch,
				'fields'  => 'all_with_meta',
			);
		} else {
			$args = array(
				'number' => $users_per_page,
				'offset' => ( $paged - 1 ) * $users_per_page,
				'role'   => $role,
				'search' => $usersearch,
				'fields' => 'all_with_meta',
			);
		}

		if ( '' !== $args['search'] ) {
			$args['search'] = '*' . $args['search'] . '*';
		}

		if ( $this->is_site_users ) {
			$args['blog_id'] = $this->site_id;
		}

		if ( isset( $_REQUEST['orderby'] ) ) {
			$args['orderby'] = $_REQUEST['orderby'];
		}

		if ( isset( $_REQUEST['order'] ) ) {
			$args['order'] = $_REQUEST['order'];
		}

		/**
		 * Filters the query arguments used to retrieve users for the current users list table.
		 *
		 * @since 4.4.0
		 *
		 * @param array $args Arguments passed to WP_User_Query to retrieve items for the current
		 *                    users list table.
		 */
		$args = apply_filters( 'users_list_table_query_args', $args );

		// Query the user IDs for this page.
		$wp_user_search = new WP_User_Query( $args );

		$this->items = $wp_user_search->get_results();

		$this->set_pagination_args(
			array(
				'total_items' => $wp_user_search->get_total(),
				'per_page'    => $users_per_page,
			)
		);
	}