MsNetflix-code3.cs

public async Task<DirectorsByCountryDto> GetDirectorsByCountry(string countryName)
{
    ...

    try
    {
        var cqlQuery = @"select director as Name from netflix_titles where country=? allow filtering";

        var returnQuery = await _cassandraContext.SelectAsync<string>(cqlQuery, countryName);

        var directors = returnQuery.ToList();

        return new DirectorsByCountryDto
        {
            Country = countryName,
            Directors = directors,
            ErrorMessage = !directors.Any() ? $"Não foi encontrado nenhum diretor para o país {countryName}" : null
        };
    }
    catch (Exception ex)
    {
        ...
    }
}