[keycloak-user] Login and Logout between two application on different subdomains

Hi, We have two applications on different subdomains. One is written with Grails 2 and the other with Laravel. The Grails app is integrated with Keycloak via a modfied Spring Security plugin and the Laravel app with Socialite. Individually both work correctly. However, when a user logs to one, we want them to be automatically logged in the other. Similarly, when the user logs out of one, we want them to be automatically logged out of the other. This is not working. Both applications use the same client and realm. Any help would be appreciated as we have no solution to this apart from maybe using a custom cookie. Regards, Tom Pearson