public async Task <bool> IsIdExistAsync(Guid collectionId, Guid userId)
{
if (userId == Guid.Empty)
{
throw new AppException($"Поле {nameof(userId)} не указано");
}
if (collectionId == Guid.Empty)
{
throw new AppException($"Поле {nameof(userId)} не указано");
}
return(await repository.FindIdAsync(collectionId, userId));
}