v0.8.9.1 Hotfix (#4376)

Co-authored-by: Joe Milazzo <josephmajora@gmail.com>
Co-authored-by: Weblate (bot) <hosted@weblate.org>
Co-authored-by: Adam Havránek <adamhavra@seznam.cz>
Co-authored-by: Aindriú Mac Giolla Eoin <aindriu80@gmail.com>
Co-authored-by: Christophorus Daniel Tegar P <tegar.200503@gmail.com>
Co-authored-by: Frozehunter <frozehunter@me.com>
Co-authored-by: Gregory.Open <gregory.open@proton.me>
Co-authored-by: Havokdan <havokdan@yahoo.com.br>
Co-authored-by: Kovács Gábor <naszalykmb@gmail.com>
Co-authored-by: karigane <169052233+karigane-cha@users.noreply.github.com>
Co-authored-by: lin49931104 <a82122794@gmail.com>
Co-authored-by: Максим Горпиніч <gorpinicmaksim0@gmail.com>
Co-authored-by: 無情天 <kofzhanganguo@126.com>
Co-authored-by: 안세훈 <on9686@gmail.com>

API/Controllers/BaseApiController.cs

@@ -37,6 +37,11 @@ public class BaseApiController : ControllerBase
     /// <remarks>Warning! Username's can contain .. and /, do not use folders or filenames explicitly with the Username</remarks>
     protected string? Username => UserContext.GetUsername();
 
+    /// <summary>
+    /// Returns the auth key used for authentication, null if a different authentication method was used
+    /// </summary>
+    protected string? AuthKey => User.Claims.FirstOrDefault(c => c.Type == "AuthKey")?.Value;
+
     /// <summary>
     /// Returns a physical file with proper HTTP caching headers and ETag support.
     /// Automatically handles conditional requests (If-None-Match) returning 304 Not Modified when appropriate.