Deploy lorawan gateways at scale

I need to be able to deploy thousands of lorawan gateways. While I have successfully deployed several test gateways just fine, individual touch of each and every one to upload certs and cups/lns info is not really going to work well. I would really like to learn where I am missing the bulk provisioning info. How can I have my manufacturer pre-load certs and other required info? I'm OK with using the CLI to register the gateway into AWS.

I have to believer this has been covered somehow.