[keycloak-user] Same user exists in both broker and identity provider

[priti guleria]

Hi,

We are currently working on keycloak as SSO solution,  where keycloak will
act as identity broker.

My use case is as below
 - User 1 is present in keycloak broker and user 1 is also present in
identity provider .
- But in identity provider user 1 does not have username assosiated with
that ,instead it has employeeid attribute as unique key.

Now my goal is to identify if user already present in broker keycloak and I
tries to login through Identity provider it should identify it as existing
account and merge both the accounts.
 (Currently since identity provider does not have username for user 1 it is
not able to identify in broker as existing account).

Is there any configuration which can tell keycloak broker to check for
employeeid attribute and not username for existing account ?

Thanks,
Priti