Okta SAML (with Dex) Integration

[OneideLuizSchneider]

Checklist:

• I've searched in the docs and FAQ for my answer: https://bit.ly/argocd-faq.
• I've included steps to reproduce the bug.
• I've pasted the output of argocd version.

Describe the bug

Howdy!
I just got an issue with Okta SAML (with Dex) Integraion.
So basically what you need to do to make this work, is add the field group on the Attribute Statements (optional) instead of Group Attribute Statements (optional).
So I tested it with the values user.email(which would be horrible to handle in the Argo RBAC config map), I tested it with the values argocd-admins, role:admin, role:readonly... all works.

It seems that ArgoCD is not getting/using the fields from Group Attribute Statements (optional).

Following this -> SAML (with Dex)

Example(this one works):

The error I get when adding the field in Group Attribute Statements (optional):

"level":"ERROR","msg":"failed to authenticate","err":"no attribute with name \"group\": [email]"

Version: v2.14.2+ad27246

I saw this issue #21235 but seems that its not only doc. related.

[reggie-k]

Dex with SAML is unmaintained:
https://dexidp.io/docs/connectors/saml/
Looks like an update to Argo CD docs is needed.

[OneideLuizSchneider]

@reggie-k Well, I couldn't make it work with OIDC (without Dex), the docs seem outdated as well.