WP_MS_Sites_List_Table::column_users

		$user_count = wp_cache_get( $blog['blog_id'] . '_user_count', 'blog-details' );
		if ( ! $user_count ) {
			$blog_users = new WP_User_Query(
				array(
					'blog_id'     => $blog['blog_id'],
					'fields'      => 'ID',
					'number'      => 1,
					'count_total' => true,
				)
			);
			$user_count = $blog_users->get_total();
			wp_cache_set( $blog['blog_id'] . '_user_count', $user_count, 'blog-details', 12 * HOUR_IN_SECONDS );
		}

		printf(
			'<a href="%s">%s</a>',
			esc_url( network_admin_url( 'site-users.php?id=' . $blog['blog_id'] ) ),
			number_format_i18n( $user_count )
		);
	}