"Invalid client (Invalid Authentication Method for Accessing this Endpoint.)" on OIDC Connection

• https://support.auth0.com/center/s/article/invalid-client-Invalid-authentication-method-for-accessing-this-endpoint-on-OIDC-connection

OpenID Connect (OIDC), kubectl oidc-login, AWS IAM OIDC, EKS OIDC, EKS module, aws iam list-open-id-connect-providers | aws iam create-open-id-connect-provider | aws iam get-open-id-connect-provider, OIDC tokens, aws_lb_listener_rule, Google Cloud Identity, Claims, keycloak_oidc_identity_provider, settings, OIDC client, client_id, client_secret, Authorization Code Flow, OIDC Web App, Back-Channel