private Validation <ValidationError, InterestedSeries> Validate(RemoveInterested request) => (Helpers.SubscriberMustBeValid(request.Subscriber), Helpers.IdListMustHaveElements(request.AnimeId))
public Task <Either <DomainError, Unit> > Handle(RemoveInterested request, CancellationToken cancellationToken)
{
return(Validate(request)
.ToEither(nameof(Commands.RemoveInterested))
.BindAsync(RemoveInterested));
}