[FEATURE] allow external OAuth config files without having to embed one

[xsgao-github]

Is your feature request related to a problem? Please describe.

Quote from https://tableau.github.io/connector-plugin-sdk/docs/oauth:

However in both cases, at least one embedded config is still required.

For Starburst Enterprise and Galaxy, users define which IDP to use for OAuth. So we can't embed a generic OAuth config in our connector, and have to put a dummy one labeled as ..._template. This is not user-friendly.

Describe the solution you'd like
Remove the restriction at least one embedded config is still required so we can build a generic connector without embed OAuth config.

Describe alternatives you've considered
None.

About You
Name: Song Gao
Company: Starburst Data

[carlossc]

At Denodo, we are also interested on this.

About You:
Name: Carlos Santos Canelles
Company: Denodo Technologies

[carlossc]

@xsgao-github , we are going to include a default OAuth configuration for Azure AD so at least there is something there that can be useful.

[rosswbrown]

Thanks for your feedback. We are tracking this in our backlog as a potential improvement for a future release. This issue will be left open and notified if there are any changes.