[keycloak-user] Keycloak offline token

I have a web app (called A) that is using Keycloak to login in. There is another external web app (called B) that uses an own system as login. Now I need to create a link between A to B that automatic logins into web app B without keycloak login form (auto-login). How can i reproduce this behavior? I have user and a password for B , and i am thinking to use an offline token could help me with this objective. username=bburke&password=geheim&grant_type=password&scope=offline_access Saving into the database of A the offline token at the first time that i use the link and then using this offline token for the next. could it be possible? my idea is something like: If database.offlinetoken = empty LINK_TO_GENERATE_OFFLINE_TOKEN --- save this token into db after login in B else LINK_USING_OFFLINETOKEN endif Do you have any example about how to build above links? Thanks in advance :)