diff --git a/src/server/BreCal/api/user.py b/src/server/BreCal/api/user.py
index 27d7436..ce4b78a 100644
--- a/src/server/BreCal/api/user.py
+++ b/src/server/BreCal/api/user.py
@@ -7,12 +7,17 @@ from marshmallow import ValidationError
 from . import verify_if_request_is_json
 from BreCal.validators.validation_error import create_dynamic_exception_response, create_validation_error_response
 
+import json
+import logging
+import traceback
+
 bp = Blueprint('user', __name__)
 
 @bp.route('/user', methods=['put'])
 @auth_guard() # no restriction by role
 def PutUser():
 
+    content = None
     try:
         verify_if_request_is_json(request)
 
@@ -21,9 +26,11 @@ def PutUser():
         return impl.user.PutUser(loadedModel)
 
     except ValidationError as ex:
+        logging.warning("UserSchema validation failed. Payload=%s", json.dumps(content, default=str))
         return create_validation_error_response(ex=ex, status_code=400)
 
     except Exception as ex:
+        logging.error("UserSchema load failed. Payload=%s\n%s", json.dumps(content, default=str), traceback.format_exc())
         return create_dynamic_exception_response(ex=None, status_code=400, message="bad format")