Just registered here and new to the eco-system.

Apologies in advance for stupid questions.

I want to programmatically establish a connection to a node using a Go RPC client as outlined here:
https://github.com/btcsuite/btcd/blob/master/docs/json_rpc_api.md#9-example-code

However, I do not wan't to run my own node.

I wan't to connect to someones' already running node.

I found some nodes I may wan't to connect to here:
https://bitnodes.io/nodes/?q=United%20States

So looks like I need a valid:
- rpc.cert
- rpcuser
- rpcpass

What is the standard procedure for obtaining these for a node that I am not running?

Is this even something I can do?

Thanks!