diff --git a/Web/modules/database/user.py b/Web/modules/database/user.py
index e8d5e10..1bd4ff7 100755
--- a/Web/modules/database/user.py
+++ b/Web/modules/database/user.py
@@ -497,6 +497,58 @@ def check_nm_pwd(username, password):
     finally:
         client.close()
 
+def add_admin(
+    username,
+    password,
+    name='',
+    last_name='',
+    is_student=False,
+    permission_preset='full_access',
+    action_permissions=None,
+    page_permissions=None,
+):
+    """
+    Add a new user to the database.
+    """
+    if not check_password_strength(password):
+        return False
+
+    client = MongoClient(cfg.MONGODB_HOST, cfg.MONGODB_PORT)
+    try:
+        db = _get_tenant_db(client)
+        users = db['users']
+
+        permission_defaults = build_default_permission_payload(permission_preset)
+
+        if isinstance(action_permissions, dict):
+            for key, value in action_permissions.items():
+                permission_defaults['actions'][str(key)] = bool(value)
+
+        if isinstance(page_permissions, dict):
+            for key, value in page_permissions.items():
+                permission_defaults['pages'][str(key)] = bool(value)
+
+        safe_name = name.strip() if name else ''
+        safe_last_name = last_name.strip() if last_name else ''
+
+        user_doc = {
+            'Username': username,
+            'Password': hashing(password),
+            'Admin': True,
+            'active_ausleihung': None,
+            'name': dp.encrypt_text(safe_name) if safe_name else '',
+            'last_name': dp.encrypt_text(safe_last_name) if safe_last_name else '',
+            'IsStudent': bool(is_student),
+            'PermissionPreset': permission_defaults['preset'],
+            'ActionPermissions': permission_defaults['actions'],
+            'PagePermissions': permission_defaults['pages'],
+        }
+
+        users.insert_one(user_doc)
+        return True
+    finally:
+        client.close()
+
 
 def add_user(
     username,
diff --git a/manage-tenant.sh b/manage-tenant.sh
index 427618f..eb19a57 100755
--- a/manage-tenant.sh
+++ b/manage-tenant.sh
@@ -207,7 +207,7 @@ tenant_id = sys.argv[1].lower()
 mode = sys.argv[2]
 sanitized = "".join(c for c in tenant_id if c.isalnum() or c == "_")
 
-us.add_user("admin", "admin123", "admin", "admin", permission_preset='full_access')
+us.add_admin("admin", "admin123", "admin", "admin")
 us.make_admin("admin")
 print("Fallback successfully applied")