Better exception handling

backend/web/login/login.py

@@ -170,8 +170,13 @@ def login():
 
                 messages.append(message)
 
+        except ory_kratos_client.exceptions.ApiAttributeError as ex:
+            # This exception is expected when there are no messages
+            pass
         except Exception as ex:
-            current_app.logger.info("No messages in kratos flow to push to UI")
+            # An unkown exception happens, we log the error but continue as it
+            # only affects the messages part
+            current_app.logger.error("Unknown exception: " + str(ex))
 
     if identity and not refresh:
         # We are already logged in, and don't need to refresh.