Delegate Token Management to Auth Backend

[vdurbha]

Currently, the st2auth module only uses the auth backend to authenticate the username/password of the user and then generates a token with a particular ttl. However, in an enterprise scenario where the auth backend is an OAuth/OIDC/SAML server, then tokens are usually generated by those servers and also managed at that layer. Is it possible to provide an option where st2auth can delegate token management to Auth Backend that has that capability?

[timka]

@vdurbha Just searched the code and there seems to be a SAML2 SSO backend. However the docs say it's still in beta: SSO: Support SSO with SAML2 for Extreme Workflow Composer web UI (beta).

[timka]

Also found this https://github.com/StackStorm/st2/issues/5625