diff --git a/api/advent22_api/routers/admin.py b/api/advent22_api/routers/admin.py
index 93b1ca0..c2edc32 100644
--- a/api/advent22_api/routers/admin.py
+++ b/api/advent22_api/routers/admin.py
@@ -7,16 +7,16 @@ from ..core.calendar_config import CalendarConfig, get_calendar_config
 from ..core.config import Config, get_config
 from ..core.depends import shuffle_solution
 from ..core.settings import SETTINGS
-from ._security import require_admin
+from ._security import user_is_admin
 
 router = APIRouter(prefix="/admin", tags=["admin"])
 
 
-@router.get("/check")
-async def check_admin(
-    _: None = Depends(require_admin),
+@router.get("/is_admin")
+async def is_admin(
+    is_admin: bool = Depends(user_is_admin),
 ) -> bool:
-    return True
+    return is_admin
 
 
 class ConfigModel(BaseModel):
diff --git a/ui/src/App.vue b/ui/src/App.vue
index 28226b3..8589e79 100644
--- a/ui/src/App.vue
+++ b/ui/src/App.vue
@@ -1,17 +1,18 @@
 <template>
   <div class="container">
     <section class="section">
-      <h1 class="title has-text-centered is-uppercase">
-        Adventskalender {{ date }}
-      </h1>
+      <h1 class="title has-text-centered is-uppercase">Adventskalender</h1>
       <h2 class="subtitle has-text-centered">Der Gelöt</h2>
     </section>
 
-    <section class="section">
+    <section v-if="is_admin" class="section">
       <ConfigView />
       <CalendarAssistant />
       <DoorMapEditor />
-      <AdminButton />
+    </section>
+
+    <section class="section">
+      <AdminButton v-model="is_admin" />
     </section>
   </div>
 </template>
@@ -33,18 +34,7 @@ import DoorMapEditor from "./components/DoorMapEditor.vue";
   },
 })
 export default class extends Vue {
-  private visible_days = 0;
-  date = "";
-
-  public mounted() {
-    this.$advent22
-      .api_get<string>("days/date")
-      .then((date: string) => (this.date = date));
-
-    this.$advent22
-      .api_get<number>("days/visible_days")
-      .then((visible_days: number) => (this.visible_days = visible_days));
-  }
+  public is_admin = false;
 }
 </script>
 
diff --git a/ui/src/components/AdminButton.vue b/ui/src/components/AdminButton.vue
index 629c31e..54608ac 100644
--- a/ui/src/components/AdminButton.vue
+++ b/ui/src/components/AdminButton.vue
@@ -1,5 +1,5 @@
 <template>
-  <LoginModal ref="login_modal" />
+  <LoginModal ref="login_modal" @submit="on_login" />
 
   <BulmaButton
     class="button is-light"
@@ -20,10 +20,23 @@ import LoginModal from "./LoginModal.vue";
     BulmaButton,
     LoginModal,
   },
+  props: {
+    modelValue: Boolean,
+  },
+  emits: ["update:modelValue"],
 })
 export default class extends Vue {
+  // true, iff Benutzer Admin ist
+  public modelValue!: boolean;
+
   declare $refs: {
     login_modal: LoginModal;
   };
+
+  public on_login() {
+    this.$advent22
+      .api_get<boolean>("admin/is_admin")
+      .then((is_admin) => this.$emit("update:modelValue", is_admin));
+  }
 }
 </script>
diff --git a/ui/src/components/LoginModal.vue b/ui/src/components/LoginModal.vue
index 1669b12..47e06b7 100644
--- a/ui/src/components/LoginModal.vue
+++ b/ui/src/components/LoginModal.vue
@@ -62,6 +62,7 @@ import BulmaButton from "./bulma/Button.vue";
   components: {
     BulmaButton,
   },
+  emits: ["submit"],
 })
 export default class extends Vue {
   public active = false;
@@ -95,6 +96,7 @@ export default class extends Vue {
 
   public submit() {
     this.$advent22.set_api_auth(this.username, this.password);
+    this.$emit("submit");
     this.set_active(false);
   }
 }