[keycloak-user] Impersonate

Hi guys, i have a little confusion about how impersonate works in Keycloak. I saw there's a impersonate API that can be called with impersonate privileges. I expected when called the API in some ways changes current logged user session data with impersonated user informations, but seems nothing will change in keycloak sessions neither returns the changed tokens and the current user sessions seems still alive. I also checked keycloak.js to find some method that allows me to call impersonate API from my webapp to allow our operators to access as users. Can someone help me please? Best regards, Daniele Bonetto