This WordPress must-use plugin provides added functionality to the OpenID Connect Generic Plugin when using custom attributes. It will add configuration fields under settings->OpenID COnnect Client where you can map an IDP-side attribute, to a Wordpress-side user meta field. It also assigns any "groups" attribute entry, to a potential Wordpress user role.
This first version is rudimentary and was build for single-purpose.
This project is a fork from oidc-keycloak-sso.