diff --git a/README.md b/README.md
index 31c818b..e8d5df8 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
-# gCube System - VRE Apps Integration Portlet
+# gCube System - Register VRE Users Portlet
 
-This component is a Liferay 6.2.6 CE Porlet which iinteracts with the VRE Modeler service during new VRE Creations
+This component is a Liferay 6.2.6 CE Porlet which allow to select a user from the portal and the user to the VRE.
 ## Structure of the project
 
 * The source code is present in the src folder. 
diff --git a/pom.xml b/pom.xml
index 4f72415..4e7291f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
 
 	<modelVersion>4.0.0</modelVersion>
@@ -73,6 +74,10 @@
 			<artifactId>custom-portal-handler</artifactId>
 			<scope>provided</scope>
 		</dependency>
+		<dependency>
+			<groupId>org.gcube.common</groupId>
+			<artifactId>storagehub-client-library</artifactId>
+		</dependency>
 		<dependency>
 			<groupId>org.gcube.portal</groupId>
 			<artifactId>notifications-common-library</artifactId>
@@ -83,16 +88,6 @@
 			<artifactId>aslsocial</artifactId>
 			<scope>provided</scope>
 		</dependency>
-		<dependency>
-			<groupId>org.gcube.common</groupId>
-			<artifactId>home-library-jcr</artifactId>
-			<scope>provided</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.gcube.common</groupId>
-			<artifactId>home-library</artifactId>
-			<scope>provided</scope>
-		</dependency>
 		<dependency>
 			<groupId>org.gcube.portal</groupId>
 			<artifactId>social-networking-library</artifactId>
@@ -195,7 +190,7 @@
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-war-plugin</artifactId>
-							<executions>
+				<executions>
 					<execution>
 						<phase>compile</phase>
 						<goals>
@@ -211,7 +206,7 @@
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-compiler-plugin</artifactId>
 				<configuration>
-						<source>${maven.compiler.source}</source>
+					<source>${maven.compiler.source}</source>
 					<target>${maven.compiler.target}</target>
 				</configuration>
 			</plugin>
diff --git a/src/main/java/org/gcube/portlets/admin/manageusers/server/ManageUsersServiceImpl.java b/src/main/java/org/gcube/portlets/admin/manageusers/server/ManageUsersServiceImpl.java
index 596ce73..3d53a0e 100644
--- a/src/main/java/org/gcube/portlets/admin/manageusers/server/ManageUsersServiceImpl.java
+++ b/src/main/java/org/gcube/portlets/admin/manageusers/server/ManageUsersServiceImpl.java
@@ -10,11 +10,11 @@ import org.gcube.applicationsupportlayer.social.ApplicationNotificationsManager;
 import org.gcube.applicationsupportlayer.social.NotificationsManager;
 import org.gcube.applicationsupportlayer.social.shared.SocialNetworkingSite;
 import org.gcube.applicationsupportlayer.social.shared.SocialNetworkingUser;
-import org.gcube.common.homelibrary.home.HomeLibrary;
-import org.gcube.common.homelibrary.home.workspace.Workspace;
 import org.gcube.common.portal.PortalContext;
 import org.gcube.common.scope.impl.ScopeBean;
 import org.gcube.common.scope.impl.ScopeBean.Type;
+import org.gcube.common.storagehub.client.plugins.AbstractPlugin;
+import org.gcube.common.storagehub.client.proxies.MessageManagerClient;
 import org.gcube.portal.custom.scopemanager.scopehelper.ScopeHelper;
 import org.gcube.portal.notifications.bean.GenericItemBean;
 import org.gcube.portal.notifications.thread.MessageNotificationsThread;
@@ -220,8 +220,8 @@ public class ManageUsersServiceImpl extends RemoteServiceServlet implements Mana
 		PortalContext pContext = PortalContext.getConfiguration();
 		String scope = pContext.getCurrentScope(getThreadLocalRequest());
 		GCubeUser currentUser = pContext.getCurrentUser(getThreadLocalRequest());
-		Workspace workspace = HomeLibrary.getUserWorkspace(currentUser.getUsername());
-
+		
+		MessageManagerClient client = AbstractPlugin.messages().build();
 		
 		List<String> recipientIds = new ArrayList<String>();
 		recipientIds.add(addressee.getId());
@@ -236,7 +236,8 @@ public class ManageUsersServiceImpl extends RemoteServiceServlet implements Mana
 		String subject = "Registration to VRE notification";
 		String body = "Dear "+addressee.getName()+", \n\n I just registered you to the VRE " + pContext.getCurrentGroupName(getThreadLocalRequest())+" on the " + gatewayName + ". \n\n";
 		body += "Please, click here to access the VRE: " + vreURL;
-		String messageId = workspace.getWorkspaceMessageManager().sendMessageToPortalLogins(subject, body, new ArrayList<String>(), recipientIds);
+		String messageId = client.sendMessage(recipientIds, subject, body, new ArrayList<String>());
+		
 
 		_log.debug("Sending message notification to: " + recipientIds.toString());
 		NotificationsManager nm = new ApplicationNotificationsManager(new SocialNetworkingSite(getThreadLocalRequest()), scope, new SocialNetworkingUser(