diff --git a/src/main/java/org/gcube/common/storagehubwrapper/server/StorageHubClientService.java b/src/main/java/org/gcube/common/storagehubwrapper/server/StorageHubClientService.java
index ee232f4..63e757a 100644
--- a/src/main/java/org/gcube/common/storagehubwrapper/server/StorageHubClientService.java
+++ b/src/main/java/org/gcube/common/storagehubwrapper/server/StorageHubClientService.java
@@ -17,6 +17,8 @@ import org.gcube.common.storagehub.model.acls.ACL;
 import org.gcube.common.storagehub.model.items.FolderItem;
 import org.gcube.common.storagehub.model.items.Item;
 import org.gcube.common.storagehub.model.items.SharedFolder;
+import org.gcube.common.storagehubwrapper.server.converter.ObjectMapper;
+import org.gcube.common.storagehubwrapper.shared.tohl.exceptions.ItemNotFoundException;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -69,7 +71,7 @@ public class StorageHubClientService {
 	 * Gets the root.
 	 *
 	 * @return the root
-	 * @throws Exception
+	 * @throws Exception the exception
 	 */
 	public FolderItem getRoot() throws Exception {
 		setContextProviders(scope, authorizationToken);
@@ -96,7 +98,6 @@ public class StorageHubClientService {
 	 * Gets the children.
 	 *
 	 * @param id the id
-	 * @param excludeNodes the exclude nodes
 	 * @return the children
 	 */
 	public List<? extends Item> getChildren(String id){
@@ -110,7 +111,7 @@ public class StorageHubClientService {
 	 *
 	 * @param itemId the item id
 	 * @return the item
-	 * @throws Exception
+	 * @throws Exception the exception
 	 */
 	public Item getItem(String itemId) throws Exception{
 		setContextProviders(scope, authorizationToken);
@@ -139,7 +140,7 @@ public class StorageHubClientService {
 	 * @param folderName the folder name
 	 * @param folderDescription the folder description
 	 * @return the item
-	 * @throws Exception
+	 * @throws Exception the exception
 	 */
 	public Item createFolder(String parentId, String folderName, String folderDescription) throws Exception {
 		setContextProviders(scope, authorizationToken);
@@ -175,10 +176,11 @@ public class StorageHubClientService {
 	/**
 	 * Gets the user acl for folder id.
 	 *
-	 * @param request the request
+	 * @param infrastructureName the infrastructure name
+	 * @param userName the user name
 	 * @param folderId the folder id
 	 * @return the user acl for folder id
-	 * @throws Exception
+	 * @throws Exception the exception
 	 */
 	public String getUserACLForFolderId(String infrastructureName, String userName, String folderId) throws Exception {
 		setContextProviders(scope, authorizationToken);
@@ -241,6 +243,30 @@ public class StorageHubClientService {
 		}
 	}
 
+
+	/**
+	 * Gets the shared folder members.
+	 *
+	 * @param folderId the folder id
+	 * @return the shared folder members
+	 * @throws Exception the exception
+	 */
+	public List<String> getSharedFolderMembers(String folderId) throws Exception {
+		Item item;
+		try {
+			item = getItem(folderId);
+			if(item instanceof SharedFolder){
+				return ObjectMapper.toListLogins((SharedFolder)item);
+			}else
+				throw new Exception("The item with "+folderId+ " is not a Shared Folder");
+
+		}catch (Exception e) {
+			logger.error("Error during get item with id: "+folderId,e);
+			throw new ItemNotFoundException(e.getMessage());
+		}
+	}
+
+
 	/* (non-Javadoc)
 	 * @see java.lang.Object#toString()
 	 */
diff --git a/src/main/java/org/gcube/common/storagehubwrapper/server/WorkspaceStorageHubClientService.java b/src/main/java/org/gcube/common/storagehubwrapper/server/WorkspaceStorageHubClientService.java
index 6374900..9dc02ac 100644
--- a/src/main/java/org/gcube/common/storagehubwrapper/server/WorkspaceStorageHubClientService.java
+++ b/src/main/java/org/gcube/common/storagehubwrapper/server/WorkspaceStorageHubClientService.java
@@ -12,10 +12,8 @@ import java.util.Map;
 import org.apache.commons.lang.Validate;
 import org.gcube.common.storagehub.model.items.FolderItem;
 import org.gcube.common.storagehub.model.items.Item;
-import org.gcube.common.storagehub.model.items.SharedFolder;
 import org.gcube.common.storagehub.model.types.GenericItemType;
 import org.gcube.common.storagehubwrapper.server.converter.HLMapper;
-import org.gcube.common.storagehubwrapper.server.converter.PortalMapper;
 import org.gcube.common.storagehubwrapper.server.tohl.Workspace;
 import org.gcube.common.storagehubwrapper.shared.ACLType;
 import org.gcube.common.storagehubwrapper.shared.tohl.WorkspaceItem;
@@ -400,23 +398,7 @@ public final class WorkspaceStorageHubClientService implements Workspace{
 	public List<String> getSharedFolderMembers(String folderId) throws Exception {
 
 		Validate.notNull(folderId,"The input folderid is null");
-
-		Item item;
-		try {
-
-			item = storageHubClientService.getItem(folderId);
-
-		}catch (Exception e) {
-			logger.error("Error during get item with id: "+folderId,e);
-			throw new ItemNotFoundException(e.getMessage());
-		}
-
-		Validate.notNull(item, "The item with id "+folderId+" was not found");
-
-		if(item instanceof SharedFolder){
-			return PortalMapper.toWorkspaceSharedFolderMembers((SharedFolder)item);
-		}else
-			throw new Exception("The item with "+folderId+ " is not a Shared Folder");
+		return storageHubClientService.getSharedFolderMembers(folderId);
 	}
 
 
diff --git a/src/main/java/org/gcube/common/storagehubwrapper/server/converter/PortalMapper.java b/src/main/java/org/gcube/common/storagehubwrapper/server/converter/ObjectMapper.java
similarity index 77%
rename from src/main/java/org/gcube/common/storagehubwrapper/server/converter/PortalMapper.java
rename to src/main/java/org/gcube/common/storagehubwrapper/server/converter/ObjectMapper.java
index 46f6ec5..d996b63 100644
--- a/src/main/java/org/gcube/common/storagehubwrapper/server/converter/PortalMapper.java
+++ b/src/main/java/org/gcube/common/storagehubwrapper/server/converter/ObjectMapper.java
@@ -13,23 +13,25 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 
+
 /**
- * The Class PortalMapper.
+ * The Class ObjectMapper.
  *
  * @author Francesco Mangiacrapa at ISTI-CNR (francesco.mangiacrapa@isti.cnr.it)
  * Jun 26, 2018
  */
-public class PortalMapper {
+public class ObjectMapper {
+
+	private static Logger logger = LoggerFactory.getLogger(ObjectMapper.class);
 
-	private static Logger logger = LoggerFactory.getLogger(PortalMapper.class);
 
 	/**
-	 * To workspace shared folder members.
+	 * To list logins.
 	 *
 	 * @param sharedfolder the sharedfolder
 	 * @return the list
 	 */
-	public static List<String> toWorkspaceSharedFolderMembers(SharedFolder sharedfolder){
+	public static List<String> toListLogins(SharedFolder sharedfolder){
 
 		Metadata users = sharedfolder.getUsers();
 		Map<String, Object> mapMember = users.getValues();