Updated design related to logger, to prepare move to SCOOP concurrency.

src/modules/basic_auth/filter/basic_auth_filter.e

@@ -50,7 +50,7 @@ feature -- Basic operations
 					execute_next (req, res)
 				end
 			else
-				api.logger.put_error (generator + ".execute Not valid", Void)
+				api.logger.put_debug (generator + ".execute without authentication", Void)
 				execute_next (req, res)
 			end
 		end

src/modules/node/node_module.e

@@ -176,9 +176,11 @@ feature -- Handler
 				a_api.user_api.new_user (l_user)
 			end
 			if a_node_api.nodes_count = 0 then
-				create l_node.make ({STRING_32} "This is a content", {STRING_32} "And a summary", {STRING_32} "Nice title")
-				l_node.set_author (l_user)
-				a_node_api.new_node (l_node)
+				if l_user /= Void then
+					create l_node.make ({STRING_32} "This is a content", {STRING_32} "And a summary", {STRING_32} "Nice title")
+					l_node.set_author (l_user)
+					a_node_api.new_node (l_node)
+				end
 			end
 
 			create s.make_from_string ("<p>Nodes:</p>")