diff --git a/src/main/java/org/gcube/portal/oidc/lr62/JWTCacheProxy.java b/src/main/java/org/gcube/portal/oidc/lr62/JWTCacheProxy.java
index d30a9ba..3ab8ffd 100644
--- a/src/main/java/org/gcube/portal/oidc/lr62/JWTCacheProxy.java
+++ b/src/main/java/org/gcube/portal/oidc/lr62/JWTCacheProxy.java
@@ -4,10 +4,14 @@ import javax.servlet.http.HttpSession;
 
 import org.gcube.oidc.rest.JWTToken;
 
+import com.liferay.portal.kernel.log.Log;
+import com.liferay.portal.kernel.log.LogFactoryUtil;
 import com.liferay.portal.model.User;
 
 public abstract class JWTCacheProxy {
 
+    protected static final Log log = LogFactoryUtil.getLog(JWTCacheProxy.class);
+
     protected static JWTCacheProxy instance;
 
     public JWTCacheProxy() {
@@ -29,14 +33,14 @@ public abstract class JWTCacheProxy {
 
     public abstract void removeUMAToken(User user, HttpSession session);
 
+    public abstract void removeAllOIDCTokens(User user);
+
+    public abstract void removeAllUMATokens(User user);
+
     public abstract void clearOIDCTokens();
 
     public abstract void clearUMATokens();
 
     public abstract void clearAllTokens();
 
-    protected String generateKey(User user, HttpSession session) {
-        return user.getScreenName() + "@" + session.getId();
-    }
-
 }
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