Add e2e test
diff --git a/core/kg/app/app.go b/core/kg/app/app.go
index 5d5527b..0c65fc8 100644
--- a/core/kg/app/app.go
+++ b/core/kg/app/app.go
@@ -1,18 +1,17 @@
 package app
 
 import (
-	"github.com/giolekva/pcloud/core/kg/log"
 	"github.com/giolekva/pcloud/core/kg/store"
 )
 
 // App represents an application layer of the kg
 type App struct {
 	store  store.Store
-	logger *log.Logger
+	logger logger
 }
 
 // NewApp creates new app
-func NewApp(store store.Store, logger *log.Logger) *App {
+func NewApp(store store.Store, logger logger) *App {
 	return &App{
 		store:  store,
 		logger: logger,