Adding Hubspot request signature to webhooks

Hello,
I wanted to add authentication on a webhook that is triggered from a workflow, however, it says I should add Authentication Type, not App Id. The documentation doesn’t say anything about Authentication Type, even if I add the App ID which is in the URL, it says: Action is invalid: INVALID_APP_ID.
How to Trigger Webhooks in HubSpot Contact-Based Workflows

That documentation says you should insert App Id not, not Authentication Type.
Any ideas on how I can add authentication here?

@Socke

I am asking the internal team about this. I will get back to you when I have an answer!

The docs says:

To verify that the requests received at your URL are from HubSpot:

My apologies, I forgot to create an app and a developers account. I took the App Id from the developers account and now the signature works!
Thanks @dennisedson for responding.