Webhook connector authentication options

[shanisagiv1]

Why?
Webhook is a common tool for integrating with vendors, and our users leverage our current webhook connecter when there is no dedicated OOTB connector or for customized use cases. Currently, this connector supports just the basic auth method of user & Pass, so it can't be leveraged for vendors that required Oauth2.0 (bearer)
What?
In order to unlock more UCs over our Webhook connector. We should support the common auth methods.
How?
Allow users to select the auth method in the connector setup: Basic or Oauth2.0 (bearer token)

Related ERs:
https://github.com/elastic/enhancements/issues/17712
https://github.com/elastic/enhancements/issues/23849

Reference & Examples:
Auth Types
Helix Webhook
Zendesk webhook

[elasticmachine]

Pinging @elastic/response-ops (Team:ResponseOps)

[samanosuke26]

In the meantime, has anyone come up with a workaround for this? I'm playing with dynamically adding a bearer token to a header but haven't figured out how to add a new token when the old one expires.

[blookot]

Adding https://github.com/elastic/enhancements/issues/23849
Do you have any update on this please?

[kentshenlim]

Any update? My vendor migrated to OAuth with bearer, so I can't use connector to connect to the service anymore.