diff --git a/src/main/java/org/gcube/portlets/admin/accountingmanager/server/SessionUtil.java b/src/main/java/org/gcube/portlets/admin/accountingmanager/server/SessionUtil.java
index 78bf27e..37d650b 100644
--- a/src/main/java/org/gcube/portlets/admin/accountingmanager/server/SessionUtil.java
+++ b/src/main/java/org/gcube/portlets/admin/accountingmanager/server/SessionUtil.java
@@ -18,8 +18,6 @@ import org.gcube.portlets.admin.accountingmanager.shared.data.AccountingType;
 import org.gcube.portlets.admin.accountingmanager.shared.data.Context;
 import org.gcube.portlets.admin.accountingmanager.shared.exception.ServiceException;
 import org.gcube.vomanagement.usermanagement.GroupManager;
-import org.gcube.vomanagement.usermanagement.exception.UserManagementSystemException;
-import org.gcube.vomanagement.usermanagement.exception.UserRetrievalFault;
 import org.gcube.vomanagement.usermanagement.impl.LiferayGroupManager;
 import org.gcube.vomanagement.usermanagement.impl.LiferayUserManager;
 import org.gcube.vomanagement.usermanagement.model.GCubeGroup;