set up grpc connection Takes in a anonymous function that registers the service.

ParseCertificates will the check (in this order) if the strings coming in are filepath, base64 encoded, or plaintext pem files So if you get a x509 key pair error that is not from a file not found it probably means that everything is broken and you are not passing in valid x509 certs.

WithGatewayDialCredentials appends transport creds to gateway dial options.

WithGatewayDialOptions If sending in any dial options please include full dial options, such as client credentials See `WithGatewayDialCredentials` for a helper in setting client credentials.