[keycloak-user] have keycloak validate a SAML uid / token combination

[mj]

Hi,

Is it possible to configure keycloak to validate SAML obtained uid / token?

I have an application authenticate via SAML on keycloak. The result is 
an authenticated user with a uid and a token. (log string of characters)

Can I, in a different process, check with keycloak that this uid/token 
is still a valid combination?

What kind of client (if any) would I have to configure in keycloak to do 
this?

MJ