hdolimpo: validate api key when the indexer is configured (#12839)

src/Jackett.Common/Definitions/hdolimpo-api.yml

@@ -53,6 +53,14 @@ settings:
       desc: desc
       asc: asc
 
+login:
+  path: /api/torrents
+  method: get
+  inputs:
+    api_token: "{{ .Config.apikey }}"
+  error:
+    - selector: a[href*="/login"]
+
 search:
   paths:
     # https://hdinnovations.github.io/UNIT3D-Community-Edition-Docs/api_endpoints.html