How to completely clear keycloak settings?

I’m trying to set up authorization via Keycloak and once I chose wrong “which groups can access Rancher by default”. And now I can’t log in via Keycloak in any way. The group selection item does not appear. In the logs: [ERROR] SAML: User does not have access
How to completely clear keycloak settings?

Maybe there is another way to set access group for Keycloak?