diff --git a/cmd/stock/main.go b/cmd/stock/main.go
index a1f9862..e246a10 100644
--- a/cmd/stock/main.go
+++ b/cmd/stock/main.go
@@ -35,7 +35,9 @@ func main() {
 		log.Log.Panic(err)
 	}
 	grw := models.NewGoodReleaseWorker(config.GoodRelease)
+	cw := models.NewCacheWorker(config.CacheClean)
 	go grw.Start()
+	go cw.Start()
 	// Startwebsrver
 	router := goji.NewMux()
 	web.BindAPI(router)
@@ -53,6 +55,7 @@ func main() {
 	// Stop services
 	srv.Close()
 	grw.Close()
+	cw.Close()
 	database.Close()
 
 	log.Log.Info("received", sig)
diff --git a/config_example.conf b/config_example.conf
index ef50a03..8c7e367 100644
--- a/config_example.conf
+++ b/config_example.conf
@@ -1,5 +1,6 @@
 webserver_bind = ":8080"
 
+
 good_availablity_template = "contrib/good_availablity.svg"
 
 [database]
@@ -10,5 +11,9 @@ connection = "file::memory:?mode=memory&cache=shared"
 # read_connection = ""
 
 [good_release]
-timer = "5m"
+every = "5m"
+after = "30m"
+
+[cache_clean]
+every = "5m"
 after = "30m"
diff --git a/models/auth.go b/models/auth.go
new file mode 100644
index 0000000..7b6bf08
--- /dev/null
+++ b/models/auth.go
@@ -0,0 +1,64 @@
+package models
+
+import (
+	"fmt"
+	"net/http"
+	"time"
+
+	"github.com/genofire/hs_master-kss-monolith/lib/log"
+)
+
+// TODO DRAFT for a rest request to a other microservice
+const PermissionURL = "https://google.com/?q=%sa%d"
+
+type Permission int
+
+const (
+	PermissionCreateGood = 1
+	PermissionDeleteGood = 2
+)
+
+type permissionMicroServiceCache struct {
+	LastCheck   time.Time
+	session     string
+	permissions map[Permission]boolMicroServiceCache
+}
+
+func (c *permissionMicroServiceCache) HasPermission(p Permission) (bool, error) {
+	c.LastCheck = time.Now()
+	if cache, ok := c.permissions[p]; ok {
+		// cache for 5min
+		before := time.Now().Add(-time.Minute * 5)
+		if !cache.LastCheck.Before(before) {
+			return cache.Value, nil
+		}
+	}
+
+	url := fmt.Sprintf(PermissionURL, c.session, p)
+	log.Log.WithField("url", url).Info("has permission?")
+	res, err := http.Get(url)
+
+	c.permissions[p] = boolMicroServiceCache{
+		LastCheck: c.LastCheck,
+		Value:     (res.StatusCode == http.StatusOK),
+	}
+	return c.permissions[p].Value, err
+}
+
+var permissionCache map[string]*permissionMicroServiceCache
+
+func init() {
+	permissionCache = make(map[string]*permissionMicroServiceCache)
+}
+
+func HasPermission(session string, p Permission) (bool, error) {
+	_, ok := permissionCache[session]
+	if !ok {
+		permissionCache[session] = &permissionMicroServiceCache{
+			LastCheck:   time.Now(),
+			session:     session,
+			permissions: make(map[Permission]boolMicroServiceCache),
+		}
+	}
+	return permissionCache[session].HasPermission(p)
+}
diff --git a/models/auth_test.go b/models/auth_test.go
new file mode 100644
index 0000000..45503cb
--- /dev/null
+++ b/models/auth_test.go
@@ -0,0 +1,15 @@
+package models
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestAuth(t *testing.T) {
+	assert := assert.New(t)
+
+	perm, err := HasPermission("session", PermissionCreateGood)
+	assert.NoError(err)
+	assert.True(perm)
+}
diff --git a/models/cache_worker.go b/models/cache_worker.go
new file mode 100644
index 0000000..6d79d6e
--- /dev/null
+++ b/models/cache_worker.go
@@ -0,0 +1,25 @@
+package models
+
+import "time"
+
+type CacheWorkerConfig struct {
+	Every Duration
+	After Duration
+}
+
+func NewCacheWorker(config CacheWorkerConfig) (w *Worker) {
+	return NewWorker(config.Every.Duration, func() {
+		// Cache if product exists
+		for index, cache := range productExistCache {
+			if cache.LastCheck.After(time.Now().Add(-config.After.Duration)) {
+				delete(productExistCache, index)
+			}
+		}
+		// Cache for permissions
+		for index, cache := range permissionCache {
+			if cache.LastCheck.After(time.Now().Add(-config.After.Duration)) {
+				delete(permissionCache, index)
+			}
+		}
+	})
+}
diff --git a/models/config.go b/models/config.go
index 9bca021..1b19ac6 100644
--- a/models/config.go
+++ b/models/config.go
@@ -11,13 +11,11 @@ import (
 
 //Config the config File of this daemon
 type Config struct {
-	WebserverBind           string          `toml:"webserver_bind"`
-	Database                database.Config `toml:"database"`
-	GoodAvailablityTemplate string          `toml:"good_availablity_template"`
-	GoodRelease             struct {
-		After Duration `toml:"after"`
-		Timer Duration `toml:"timer"`
-	} `toml:"good_release"`
+	WebserverBind           string            `toml:"webserver_bind"`
+	Database                database.Config   `toml:"database"`
+	GoodAvailablityTemplate string            `toml:"good_availablity_template"`
+	GoodRelease             GoodReleaseConfig `toml:"good_release"`
+	CacheClean              CacheWorkerConfig `toml:"cache_clean"`
 }
 
 // ReadConfigFile reads a config model from path of a yml file
diff --git a/models/good.go b/models/good.go
index 56c41fd..f1fca0b 100644
--- a/models/good.go
+++ b/models/good.go
@@ -19,7 +19,7 @@ type Good struct {
 	RecievedAt *time.Time `sql:"default:current_timestamp"`
 	// Make it temporary unusable
 	LockedAt     *time.Time
-	LockedSecret string
+	LockedSecret string `json:"-"`
 	// Make it unusable
 	DeletedAt *time.Time
 	Sended    bool
diff --git a/models/good_release.go b/models/good_release.go
index ccb4623..c218450 100644
--- a/models/good_release.go
+++ b/models/good_release.go
@@ -4,45 +4,17 @@ import (
 	"time"
 
 	"github.com/genofire/hs_master-kss-monolith/lib/database"
-	"github.com/genofire/hs_master-kss-monolith/lib/log"
 )
 
 type GoodReleaseConfig struct {
 	After Duration `toml:"after"`
-	Timer Duration `toml:"timer"`
+	Every Duration `toml:"every"`
 }
 
-type GoodReleaseWorker struct {
-	unlockTimer time.Duration
-	unlockAfter time.Duration
-	quit        chan struct{}
-}
-
-func NewGoodReleaseWorker(grc GoodReleaseConfig) (rw *GoodReleaseWorker) {
-	rw = &GoodReleaseWorker{
-		unlockTimer: grc.Timer.Duration,
-		unlockAfter: grc.After.Duration,
-		quit:        make(chan struct{}),
-	}
-	return
-}
-
-func (rw *GoodReleaseWorker) Start() {
-	ticker := time.NewTicker(rw.unlockTimer)
-	for {
-		select {
-		case <-ticker.C:
-			count := goodRelease(rw.unlockAfter)
-			log.Log.WithField("count", count).Info("goods released")
-		case <-rw.quit:
-			ticker.Stop()
-			return
-		}
-	}
-}
-
-func (rw *GoodReleaseWorker) Close() {
-	close(rw.quit)
+func NewGoodReleaseWorker(grc GoodReleaseConfig) *Worker {
+	return NewWorker(grc.Every.Duration, func() {
+		goodRelease(grc.After.Duration)
+	})
 }
 
 func goodRelease(unlockAfter time.Duration) int64 {
diff --git a/models/good_release_test.go b/models/good_release_test.go
index 7c4ed8f..24989cd 100644
--- a/models/good_release_test.go
+++ b/models/good_release_test.go
@@ -32,7 +32,7 @@ func TestGoodRelease(t *testing.T) {
 	assert.Equal(int64(1), count, "unlock after timeout")
 
 	grw := NewGoodReleaseWorker(GoodReleaseConfig{
-		Timer: Duration{Duration: time.Duration(3) * time.Millisecond},
+		Every: Duration{Duration: time.Duration(3) * time.Millisecond},
 		After: Duration{Duration: time.Duration(5) * time.Millisecond},
 	})
 	go grw.Start()
diff --git a/models/worker.go b/models/worker.go
new file mode 100644
index 0000000..9b26ca0
--- /dev/null
+++ b/models/worker.go
@@ -0,0 +1,34 @@
+package models
+
+import "time"
+
+type Worker struct {
+	every time.Duration
+	run   func()
+	quit  chan struct{}
+}
+
+func NewWorker(every time.Duration, f func()) (w *Worker) {
+	w = &Worker{
+		every: every,
+		run:   f,
+		quit:  make(chan struct{}),
+	}
+	return
+}
+
+func (w *Worker) Start() {
+	ticker := time.NewTicker(w.every)
+	for {
+		select {
+		case <-ticker.C:
+			w.run()
+		case <-w.quit:
+			ticker.Stop()
+			return
+		}
+	}
+}
+func (w *Worker) Close() {
+	close(w.quit)
+}
diff --git a/profile.cov b/profile.cov
new file mode 100644
index 0000000..7be0896
--- /dev/null
+++ b/profile.cov
@@ -0,0 +1,103 @@
+mode: count
+github.com/genofire/hs_master-kss-monolith/models/cache_worker.go:10.59,11.49 1 0
+github.com/genofire/hs_master-kss-monolith/models/cache_worker.go:11.49,13.47 1 0
+github.com/genofire/hs_master-kss-monolith/models/cache_worker.go:19.3,19.45 1 0
+github.com/genofire/hs_master-kss-monolith/models/cache_worker.go:13.47,14.69 1 0
+github.com/genofire/hs_master-kss-monolith/models/cache_worker.go:14.69,16.5 1 0
+github.com/genofire/hs_master-kss-monolith/models/cache_worker.go:19.45,20.69 1 0
+github.com/genofire/hs_master-kss-monolith/models/cache_worker.go:20.69,22.5 1 0
+github.com/genofire/hs_master-kss-monolith/models/worker.go:11.59,18.2 2 1
+github.com/genofire/hs_master-kss-monolith/models/worker.go:20.26,22.6 2 1
+github.com/genofire/hs_master-kss-monolith/models/worker.go:22.6,23.10 1 6
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+github.com/genofire/hs_master-kss-monolith/models/worker.go:26.17,28.10 2 1
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+github.com/genofire/hs_master-kss-monolith/models/good_release.go:15.46,17.3 1 5
+github.com/genofire/hs_master-kss-monolith/models/good_release.go:20.51,23.2 2 7
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