public Task <Either <BaseError, string> > Handle( ScanLocalLibraryIfNeeded request, CancellationToken cancellationToken) => Handle(request);
Task <Either <BaseError, string> > IRequestHandler <ScanLocalLibraryIfNeeded, Either <BaseError, string> > .Handle( ScanLocalLibraryIfNeeded request, CancellationToken cancellationToken) => Handle(request, cancellationToken);