Method access_key

cpp/src/arrow/filesystem/s3_test_util.cc:74–74

std::string MinioTestServer::connect_string() const { return impl_->connect_string_; }

std::string MinioTestServer::access_key() const { return impl_->access_key_; }

std::string MinioTestServer::secret_key() const { return impl_->secret_key_; }