Webhooks (v2) with Python SDK - Getting Folder ID, Creating Webhook, Getting Address

Goal: create a folder that when I upload a file will call my own API to access and read the file

I have a few questions so looking for tips on how to do this with any best practices, resources, or tips.

Getting Folder ID

The docs for webhooks start with a folder id but don't describe how to get the id.  Is one of these the best practices way to do it?

# import and initialize client auth not shown

# get folder_id by searching
folder_name = 'my-watchdir'
results = client.search().query(folder_name, result_type='folder')
for folder in results:
    if folder.name == folder_name:
        return folder.id

# get folder_id by shared link
link = 'https://...' # copied from Box interface
folder = client.get_shared_item(link)
return folder.id

Creating Webhook

Once having the folder_id can then create a webhook.  The interface seems to only support v1 webhooks so can't be set on a per-folder basis.

https://developer.box.com/guides/webhooks/manage/for-folder/ 

folder_id = '1234' 
listener = 'https://...' # my api endpoint

# Actually just needed the folder, not the id in retrospect
folder = client.folder(folder_id=folder_id)
webhook = client.create_webhook(folder, ['FILE.UPLOAD'], listener)

Verifying Webhook

I'm just using ipython to try and figure things out, is there Python documentation somewhere I missed?  How do I get the address of the listener I just created or serialize / print its values to make sure it is the instance I thought it should be?

folder_id = '1234'
webhooks = list(client.get_webhooks(folder_id))
for hook in webhooks:
    print(hook.get_url())
    # how do I get address for my API listener?

Token Expiration

It seems the token expires, do I have to keep re-creating the webhook?  How do I make sure I can read the file on the receiving end of the API?  For example, this is what I see in my CloudWatch logs of a lambda function:

{'type': 'webhook_event', 'id': '1234', 'created_at': '2020-06-17T16:44:55-07:00', 'trigger': 'NO_ACTIVE_SESSION', 'webhook': {'id': '1234', 'type': 'webhook'}, 'created_by': {'type': 'user', 'id': '2', 'name': 'Anonymous User', 'login': ''}, 'source': {'id': '1234', 'type': 'file'}, 'additional_info': []

If there is working sample code for this in a blog post, tutorial, etc. please point me to it.  I've done some searching around without success.  Thanks!