diff --git a/main.go b/main.go
index f88e492..5414840 100644
--- a/main.go
+++ b/main.go
@@ -54,7 +54,6 @@ func serveTemplate(w http.ResponseWriter, r *http.Request) {
         var datetimestring = t.Format("20060102150405")
         var scales = getMyDevs(userName)
         var last_metrics []OneMetric
-        var checkout_session_id string
 
 	if (r.URL.Path == "/scales.html") {
                 // wir holen noch die letzten Metriken
@@ -69,13 +68,11 @@ func serveTemplate(w http.ResponseWriter, r *http.Request) {
             DateTimeString string
             Scales []string
             LastMetrics []OneMetric
-            CheckoutSessionID string
         } {
             userName,
             datetimestring,
             scales,
             last_metrics,
-            checkout_session_id,
         }
 
 	if err := tmpl.ExecuteTemplate(w, "layout", &data); err != nil {
diff --git a/persistence.go b/persistence.go
index d1a38c5..640359d 100644
--- a/persistence.go
+++ b/persistence.go
@@ -3,6 +3,7 @@ package main
 import (
 	"time"
         "strings"
+        "fmt"
         "log"
 	"crypto/rand"
 	"golang.org/x/crypto/bcrypt"
@@ -54,6 +55,7 @@ type Dev struct {
 	Alias         string
 	Alarmactive   string
 	Smsnumber     string
+	ActiveUntil   string          // Abo bezahlt bis TT.MM.YYYY
 }
 
 func initDB() {
@@ -203,6 +205,42 @@ func getDevSmsnumber(deveui string) string {
         return res
 }
 
+func prolongActivation(deveui string, years int) (string, error) {
+        conn := globalPool.Get()
+        defer conn.Close()
+
+	active_until_old, err := redis.String(conn.Do("HGET", devPrefix+deveui, "active_until"))
+        if err == nil {
+          logit("prolongActivation: active_until: " +active_until_old)
+        } else {
+          log.Print(err)
+        }
+
+        layout := "02.01.2006"
+        t, err := time.Parse(layout, active_until_old)
+
+        if err != nil {
+          fmt.Println(err)
+        }
+        fmt.Println(t.Unix())
+
+        var t_new time.Time
+        if t.Before(time.Now()) {
+          t_new = time.Now().AddDate(1, 0, 0) 
+        } else {
+          t_new = t.AddDate(1, 0, 0) 
+        }
+        active_until_new := t_new.Format(layout)
+
+	// SET object
+	_, err1 := conn.Do("HMSET", devPrefix+deveui, "active_until", active_until_new)
+	if err1 != nil {
+		return "",err1
+	}
+
+	return active_until_new, nil
+}
+
 func randString(n int) string {
     const alphanum = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
     var bytes = make([]byte, n)
diff --git a/snippets/payment_cancelled.html b/snippets/payment_cancelled.html
index 277b677..e90ab50 100644
--- a/snippets/payment_cancelled.html
+++ b/snippets/payment_cancelled.html
@@ -1,4 +1,9 @@
 {{define "body_content"}}
+{{ if ne .UserName "" }}
+
 <p class="title is-4">Zahlung abgebrochen!</p>
 <p>Zahlung wurde abgebrochen</p>
+{{ else }}
+<h4>Bitte zuerst <a href="login.html">einloggen</a></h4>
+{{end}}
 {{end}}
diff --git a/snippets/payment_received.html b/snippets/payment_received.html
index 4f5a207..e04e794 100644
--- a/snippets/payment_received.html
+++ b/snippets/payment_received.html
@@ -1,4 +1,9 @@
 {{define "body_content"}}
+{{ if ne .UserName "" }}
+
 <p class="title is-4">Danke schoen!</p>
 <p>Danke fuer die Zahlung!</p>
+{{ else }}
+<h4>Bitte zuerst <a href="login.html">einloggen</a></h4>
+{{end}}
 {{end}}