Fix deprecation warnings

templates/login/base_login_page.html

@@ -4,7 +4,7 @@
     <meta charset="utf-8">
     <meta name="viewport" content="width=device-width, initial-scale=1">
     <meta name="description" content="Auth service">
-    <title>{{ app_name }} - {{ page_title }}</title>
+    <title>{{ _p.app_name }} - {{ _p.page_title }}</title>
 
     <!-- Bootstrap core CSS -->
     <link href="/assets/css/bootstrap.css" rel="stylesheet" crossorigin="anonymous"/>
@@ -41,14 +41,14 @@
 
 <main class="form-signin">
 
-    <h1 class="h3 mb-3 fw-normal">{{ page_title }}</h1>
+    <h1 class="h3 mb-3 fw-normal">{{ _p.page_title }}</h1>
 
     <div class="alert alert-danger" role="alert">
-        {{ danger }}
+        {{ _p.danger }}
     </div>
 
     <div class="alert alert-success" role="alert">
-        {{ success }}
+        {{ _p.success }}
     </div>
 
     {% block content %}