[keycloak-user] Federated Identity linking custom attribute

[Daniel Teixeira]

Hello,
When using a SAML Identity Provider to link to existing keycloak users.
Keycloak uses the NameID to do the linking.
How can I use another SAML attribute to do the linking?

I have tried the "Username Template Importer" in the identity provider, but
this only works when creating new users. In my case the user is already
created and I just need to do the linking.

Thanks in advance for your help,
Daniel