in src/signing.c [89:97]
void aws_crt_signing_config_aws_set_service(
aws_crt_signing_config_aws *signing_config,
const uint8_t *service,
size_t service_length) {
aws_byte_buf_clean_up(&signing_config->service);
struct aws_byte_buf input = aws_byte_buf_from_array(service, service_length);
aws_byte_buf_init_copy(&signing_config->service, aws_crt_default_allocator(), &input);
signing_config->config.service = aws_byte_cursor_from_buf(&signing_config->service);
}