diff --git a/src/main/java/org/gcube/common/authorization/utils/clientid/RenewalProvider.java b/src/main/java/org/gcube/common/authorization/utils/clientid/RenewalProvider.java
index 8805ef8..003b29f 100644
--- a/src/main/java/org/gcube/common/authorization/utils/clientid/RenewalProvider.java
+++ b/src/main/java/org/gcube/common/authorization/utils/clientid/RenewalProvider.java
@@ -2,6 +2,9 @@ package org.gcube.common.authorization.utils.clientid;
 
 import org.gcube.common.authorization.utils.secret.Secret;
 
+/**
+ * @author Luca Frosini (ISTI - CNR)
+ */
 public interface RenewalProvider {
 
 	public Secret renew() throws Exception;
diff --git a/src/main/java/org/gcube/common/authorization/utils/manager/SecretManagerProvider.java b/src/main/java/org/gcube/common/authorization/utils/manager/SecretManagerProvider.java
index 569546b..64f0e85 100644
--- a/src/main/java/org/gcube/common/authorization/utils/manager/SecretManagerProvider.java
+++ b/src/main/java/org/gcube/common/authorization/utils/manager/SecretManagerProvider.java
@@ -1,12 +1,10 @@
 package org.gcube.common.authorization.utils.manager;
 
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
+/**
+ * @author Luca Frosini (ISTI - CNR)
+ */
 public class SecretManagerProvider {
 
-	private static Logger logger = LoggerFactory.getLogger(SecretManagerProvider.class);
-	
 	public static SecretManagerProvider instance = new SecretManagerProvider();
 	
 	// Thread local variable containing each thread's ID
@@ -22,7 +20,6 @@ public class SecretManagerProvider {
 	private SecretManagerProvider(){}
     
 	public SecretManager get(){
-		logger.trace("Thread name {} id {} ", Thread.currentThread().getName(), Thread.currentThread().getId());
 		SecretManager secretManager = thread.get();
 		return secretManager;
 	}
diff --git a/src/main/java/org/gcube/common/authorization/utils/secret/SecretUtility.java b/src/main/java/org/gcube/common/authorization/utils/secret/SecretUtility.java
index 4b9f73e..3f9672d 100644
--- a/src/main/java/org/gcube/common/authorization/utils/secret/SecretUtility.java
+++ b/src/main/java/org/gcube/common/authorization/utils/secret/SecretUtility.java
@@ -2,6 +2,9 @@ package org.gcube.common.authorization.utils.secret;
 
 import java.util.regex.Pattern;
 
+/**
+ * @author Luca Frosini (ISTI - CNR)
+ */
 public class SecretUtility {
 
 	public static final String UUID_REGEX = "^([a-fA-F0-9]{8}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{12}-[a-fA-F0-9]{8,9}){1}$";