Use Keycloak for OIDC authentication

[!IMPORTANT]
Documentation Update: Product documentation, which were located in this repository under /website, are now located in hashicorp/web-unified-docs, colocated with all other product documentation. Contributions to this content should be done in the web-unified-docs repo, and not this one. Changes made to /website content in this repo will not be reflected on the developer.hashicorp.com website.

1. Select/create a Realm and Client. Select a Client and visit Settings.
2. Client Protocol: openid-connect
3. Access Type: confidential
4. Standard Flow Enabled: On
5. Configure Root URL such as http://vault.example.com
6. Configure Valid Redirect URIs such as
   • http://vault.example.com/ui/vault/auth/oidc/oidc/callback
   • http://vault.example.com/oidc/oidc/callback
7. Save.
8. Visit Credentials. Select Client ID and Secret and note the generated secret.