Creating a subscription with initial position as "earliest"

My use case: I have a shared subscription with a bunch of consumers. Suppose, all the consumers die and there are messages still being published to the topic. When a new consumer comes in, I want it to read from the last unacknowledged message so that no messages are lost or unprocessed.

So, I want to create a subscription with initial subscription position as `earliest` but I don't see any option to set the initial position. Also, What is default behavior? `earliest` or `latest` ?

Start by locating the subscription-creation API in the NodeJS client and tracing how its initial position is selected. Check the existing behavior and documentation for the default, then define the option and verify that a new consumer can begin at the requested position without losing unacknowledged messages.

Written by the indexing model from the issue text.