public async Task <CertificateContent> Get(string certificateId, IAuthHeaders authHeaders)
        {
            var channel = new Channel("data.certificate-manager.api.cloud.yandex.net", 443, new SslCredentials());
            var client  = new CertificateContentService.CertificateContentServiceClient(channel);
            var request = new GetCertificateContentRequest
            {
                CertificateId = certificateId
            };
            var response = await client.GetAsync(request, authHeaders.ToMetadata());

            return(new CertificateContent(
                       id: response.CertificateId,
                       chain: response.CertificateChain.ToArray(),
                       privateKey: response.PrivateKey
                       ));
        }