diff --git a/src/main/java/org/gcube/data/analysis/nlphub/session/SessionUtils.java b/src/main/java/org/gcube/data/analysis/nlphub/session/SessionUtils.java
index 73a53e4..a89fb79 100644
--- a/src/main/java/org/gcube/data/analysis/nlphub/session/SessionUtils.java
+++ b/src/main/java/org/gcube/data/analysis/nlphub/session/SessionUtils.java
@@ -3,13 +3,17 @@ package org.gcube.data.analysis.nlphub.session;
 import javax.servlet.http.HttpServletRequest;
 
 import org.gcube.data.analysis.nlphub.shared.Constants;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 public class SessionUtils {
+	private static final Logger logger = LoggerFactory.getLogger(SessionUtils.class);
 	
 	public static String getToken(HttpServletRequest request) {
 		String token = request.getParameter(Constants.TOKEN_PARAMETER);
+		logger.debug("Token in request: "+token);
 		if(token == null || token.isEmpty()){
-			
+			logger.error("Token in request is null");
 		}
 		return token;
 	}