diff --git a/admin.py b/admin.py
index beb17cd..f6567d1 100644
--- a/admin.py
+++ b/admin.py
@@ -14,6 +14,7 @@ import os.path
 import hashlib
 import calendar
 import locale
+import segno
 
 @ui.page('/admin')
 def page_admin():
@@ -758,9 +759,15 @@ def page_admin():
 
                                 api_link_column.clear()
                                 for i in app.urls:
-                                    link = ui.link(f'{i}/api/stamp/"API-Schlüssel"', f'{i}/api/stamp/{api_key_input.value}')
-                                    link.tooltip("ACHTUNG: Klick auf den Link löst Stempelaktion aus!")
-                                    link.move(api_link_column)
+                                    with ui.row() as link_row:
+                                        link_string = f'{i}/api/stamp/{api_key_input.value}'
+                                        link = ui.link(f'{i}/api/stamp/"API-Schlüssel"', link_string).tooltip(("ACHTUNG: Klick auf den Link löst Stempelaktion aus!"))
+                                        qr = segno.make_qr(link_string).svg_data_uri()
+                                        with ui.image(qr).classes('w-1/3'):
+                                            with ui.tooltip().classes('bg-white border'):
+                                                ui.image(qr).classes('w-64')
+
+                                    link_row.move(api_link_column)
 
                                 workhours_select.clear()
                                 workhour_list = list(current_user.workhours)
@@ -808,6 +815,7 @@ def page_admin():
                             user_selection.clear()
                             user_selection.set_options(userlist)
                             user_selection.value = current_user.username
+                            user_selection_changed()
                             dialog.close()
                             ui.notify("Einstellungen gespeichert")
 
@@ -927,32 +935,45 @@ def page_admin():
                     user_ui()
 
                     with ui.column():
-                        with ui.card() as usersettingscard:
-                            ui.markdown("**Benutzereinstellungen**")
-                            with ui.grid(columns="auto 1fr") as usersettingsgrid:
+                        @ui.refreshable
+                        def usersettings_card():
+                            global usersettingscard
+                            with ui.card() as usersettingscard:
+                                ui.markdown("**Benutzereinstellungen**")
+                                with ui.grid(columns="auto 1fr") as usersettingsgrid:
 
-                                ui.markdown("Benutzername:")
-                                username_input = ui.input()
-                                ui.markdown("Voller Name:")
-                                fullname_input = ui.input()
-                                ui.markdown("Passwort")
-                                password_input = ui.input(password=True)
-                                password_input.value = ""
-                                ui.markdown("API-Schlüssel:")
-                                with ui.row():
-                                    api_key_input = ui.input().props('size=37')
-                                    def new_api_key():
-                                        api_key_input.value = hashlib.shake_256(bytes(f'{username_input.value}_{datetime.datetime.now().timestamp()}', 'utf-8')).hexdigest(20)
-                                    ui.button("Neu", on_click=new_api_key)
-                                ui.markdown('Aufruf zum Stempeln:')
-                                with ui.column().classes('gap-0') as api_link_column:
-                                    stamp_link = [ ]
-                                    for i in app.urls:
-                                        stamp_link.append(ui.link(f'{i}/api/stamp/"API-Schüssel"'))
+                                    ui.markdown("Benutzername:")
+                                    global username_input
+                                    username_input = ui.input()
+                                    ui.markdown("Voller Name:")
+                                    global fullname_input
+                                    fullname_input = ui.input()
+                                    ui.markdown("Passwort")
+                                    global password_input
+                                    password_input = ui.input(password=True)
+                                    password_input.value = ""
+                                    ui.markdown("API-Schlüssel:")
+                                    with ui.row():
+                                        global api_key_input
+                                        api_key_input = ui.input().props('size=37')
+                                        def new_api_key():
+                                            api_key_input.value = hashlib.shake_256(bytes(f'{username_input.value}_{datetime.datetime.now().timestamp()}', 'utf-8')).hexdigest(20)
 
-                            with ui.grid(columns=2):
-                                ui.button("Speichern", on_click=save_user_settings).tooltip("Klicken Sie hier um die Änderungen zu speichern.")
-                                ui.button("Löschen", on_click=del_user)
+                                        ui.button("Neu", on_click=new_api_key).tooltip("Neuen API-Schlüssel erzeugen. Wird erst beim Klick auf Speichern übernommen und entsprechende Links und QR-Codes aktualisiert")
+                                    ui.markdown('Aufruf zum Stempeln:')
+                                    global api_link_column
+                                    with ui.column().classes('gap-0') as api_link_column:
+                                        global stamp_link
+                                        stamp_link = [ ]
+                                        for i in app.urls:
+                                            stamp_link.append(ui.link(f'{i}/api/stamp/"API-Schüssel"'))
+
+
+                                with ui.grid(columns=2):
+                                    ui.button("Speichern", on_click=save_user_settings).tooltip("Klicken Sie hier um die Änderungen zu speichern.")
+                                    ui.button("Löschen", on_click=del_user)
+
+                        usersettings_card()
 
                         with ui.card() as photocard:
                             ui.markdown('**Foto**')
diff --git a/playgound.py b/playgound.py
index 6428d72..1800280 100644
--- a/playgound.py
+++ b/playgound.py
@@ -1,8 +1,12 @@
 from nicegui import ui
+import segno
 
-test = ('Eintrag 1')
+string = ""
+for i in range(1000):
+    string += str(i)
 
-ui.markdown(test)
-ui.markdown('Nächstes Element')
+qr_code = segno.make_qr(string).svg_data_uri()
+#qr_code.save("qr_code.png", scale=5, border=0)
+ui.image(qr_code)
 
 ui.run(language="de-DE", port=9000)
\ No newline at end of file
diff --git a/users/testuser1/settings.json b/users/testuser1/settings.json
index 1959d9c..7f31cc1 100644
--- a/users/testuser1/settings.json
+++ b/users/testuser1/settings.json
@@ -1,7 +1,7 @@
 {
     "username": "testuser1",
     "fullname": "Pia Paulina",
-    "password": "9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08",
+    "password": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
     "workhours": {
         "2025-05-13": {
             "1": "4",
@@ -34,5 +34,5 @@
             "vacation": "30"
         }
     },
-    "api_key": "de4403f629a30450b2df1aa619a1c06112035499"
+    "api_key": "0d8b1baf9219fe568c0f0ea7c4244927e1c901da"
 }
\ No newline at end of file
diff --git a/users/testuser99/settings.json b/users/testuser99/settings.json
new file mode 100644
index 0000000..c9e9caf
--- /dev/null
+++ b/users/testuser99/settings.json
@@ -0,0 +1,18 @@
+{
+    "username": "testuser99",
+    "fullname": "testuser99",
+    "password": "37a8eec1ce19687d132fe29051dca629d164e2c4958ba141d5f4133a33f0688f",
+    "api_key": "d0c28e4b8dff9685e774e6e2e6bcea6b746d34af",
+    "workhours": {
+        "2025-05-08": {
+            "1": 0,
+            "2": 0,
+            "3": 0,
+            "4": 0,
+            "5": 0,
+            "6": 0,
+            "7": 0,
+            "vacation": 0
+        }
+    }
+}
\ No newline at end of file