in src/signing.c [216:227]
int aws_crt_sign_request_aws(
aws_crt_signable *signable,
const aws_crt_signing_config_aws *signing_config,
aws_crt_signing_complete_fn *on_complete,
void *user_data) {
return aws_sign_request_aws(
aws_crt_default_allocator(),
signable->signable,
(struct aws_signing_config_base *)&signing_config->config,
on_complete,
user_data);
}