public function list_( $args, $assoc_args ) {
		$user      = $this->fetcher->get_check( $args[0] );
		$formatter = $this->get_formatter( $assoc_args );
		$manager   = WP_Session_Tokens::get_instance( $user->ID );
		$sessions  = $this->get_all_sessions( $manager );

		if ( 'ids' === $formatter->format ) {
			echo implode( ' ', array_keys( $sessions ) );
		} else {
			$formatter->display_items( $sessions );
		}
	}