diff --git a/src/risotto/config.py b/src/risotto/config.py
index 570707f..bae6488 100644
--- a/src/risotto/config.py
+++ b/src/risotto/config.py
@@ -65,6 +65,18 @@ if 'CELERYRISOTTO_DB_USER' in environ:
     CELERYRISOTTO_DB_USER = environ['CELERYRISOTTO_DB_USER']
 else:
     CELERYRISOTTO_DB_USER = config.get('CELERYRISOTTO_DB_USER', None)
+if 'LEMUR_DB_NAME' in environ:
+    LEMUR_DB_NAME = environ['LEMUR_DB_NAME']
+else:
+    LEMUR_DB_NAME = config.get('LEMUR_DB_NAME', None)
+if 'LEMUR_DB_PASSWORD' in environ:
+    LEMUR_DB_PASSWORD = environ['LEMUR_DB_PASSWORD']
+else:
+    LEMUR_DB_PASSWORD = config.get('LEMUR_DB_PASSWORD', None)
+if 'LEMUR_DB_USER' in environ:
+    LEMUR_DB_USER = environ['LEMUR_DB_USER']
+else:
+    LEMUR_DB_USER = config.get('LEMUR_DB_USER', None)
 if 'DB_ADDRESS' in environ:
     DB_ADDRESS = environ['DB_ADDRESS']
 else:
@@ -141,7 +153,8 @@ def dsn_factory(database, user, password, address=DB_ADDRESS):
 
 _config = {'database': {'dsn': dsn_factory(RISOTTO_DB_NAME, RISOTTO_DB_USER, RISOTTO_DB_PASSWORD),
                         'tiramisu_dsn': dsn_factory(TIRAMISU_DB_NAME, TIRAMISU_DB_USER, TIRAMISU_DB_PASSWORD),
-                        'celery_dsn': dsn_factory(CELERYRISOTTO_DB_NAME, CELERYRISOTTO_DB_USER, CELERYRISOTTO_DB_PASSWORD)
+                        'celery_dsn': dsn_factory(CELERYRISOTTO_DB_NAME, CELERYRISOTTO_DB_USER, CELERYRISOTTO_DB_PASSWORD),
+                        'lemur_dns': dsn_factory(LEMUR_DB_NAME, LEMUR_DB_USER, LEMUR_DB_PASSWORD),
                         },
            'http_server': {'port': RISOTTO_PORT,
                            'default_user': DEFAULT_USER,
diff --git a/src/risotto/dispatcher.py b/src/risotto/dispatcher.py
index 607a90f..ddda87e 100644
--- a/src/risotto/dispatcher.py
+++ b/src/risotto/dispatcher.py
@@ -475,6 +475,8 @@ class Dispatcher(register.RegisterDispatcher,
                                           )
         # notification
         if function_obj.get('notification'):
+            if returns is None:
+                raise Exception(_(f'function "{function_obj["full_module_name"]}.{function_obj["function"].__name__}" must returns something for {function_obj["notification"]}!'))
             notif_version, notif_message = function_obj['notification'].split('.', 1)
             if not isinstance(returns, list):
                 send_returns = [returns]
diff --git a/src/risotto/http.py b/src/risotto/http.py
index 5b235f2..151f6e5 100644
--- a/src/risotto/http.py
+++ b/src/risotto/http.py
@@ -23,9 +23,13 @@ extra_statics = {}
 
 def create_context(request):
     risotto_context = Context()
-    risotto_context.username = request.match_info.get('username',
-                                                      get_config()['http_server']['default_user'],
-                                                      )
+    if 'username' in dict(request.match_info):
+        username = request.match_info['username']
+    elif 'username' in request.headers:
+        username = request.headers['username']
+    else:
+        username = get_config()['http_server']['default_user']
+    risotto_context.username = username
     return risotto_context
 
 
diff --git a/src/risotto/logger.py b/src/risotto/logger.py
index 2c168d7..2ee09aa 100644
--- a/src/risotto/logger.py
+++ b/src/risotto/logger.py
@@ -192,7 +192,7 @@ class Logger:
             await connection.execute(sql,
                                      risotto_context.start_id,
                                      datetime.now(),
-                                     err,
+                                     err[:254],
                                      LEVELS.index('Failure'),
                                      )
 
diff --git a/src/risotto/register.py b/src/risotto/register.py
index b08a1b3..ed01119 100644
--- a/src/risotto/register.py
+++ b/src/risotto/register.py
@@ -107,6 +107,7 @@ class RegisterDispatcher:
             version = obj['version']
             if version not in self.messages:
                 self.messages[version] = {}
+            obj['message'] = tiramisu_message
             self.messages[version][tiramisu_message] = obj
 
     def get_function_args(self,