/account/export: prepare for import into a different travelynx instance

	$self->res->headers->content_disposition(

		"attachment; filename=travelynx-export-${name}.json;");

	# backends are required for 'index.pl import journeys'

	$self->render(

		json => {

			account    => $db->select( 'users', '*', { id => $uid } )->hash,

			backends   => [ $self->stations->get_backends( db => $db ) ],

			in_transit => [

				$db->select( 'in_transit_str', '*', { user_id => $uid } )

				  ->hashes->each