fix merge conflict

Jellyfin.Api/Auth/DefaultAuthorizationPolicy/DefaultAuthorizationHandler.cs

@@ -49,6 +49,11 @@ namespace Jellyfin.Api.Auth.DefaultAuthorizationPolicy
             var isInLocalNetwork = _httpContextAccessor.HttpContext is not null
                                    && _networkManager.IsInLocalNetwork(_httpContextAccessor.HttpContext.GetNormalizedRemoteIp());
             var user = _userManager.GetUserById(userId);
+            if (user is null)
+            {
+                throw new ResourceNotFoundException();
+            }
+
             // User cannot access remotely and user is remote
             if (!isInLocalNetwork && !user.HasPermission(PermissionKind.EnableRemoteAccess))
             {

Jellyfin.Api/Auth/FirstTimeSetupPolicy/FirstTimeSetupHandler.cs

@@ -2,6 +2,7 @@ using System.Threading.Tasks;
 using Jellyfin.Api.Constants;
 using Jellyfin.Api.Extensions;
 using MediaBrowser.Common.Configuration;
+using MediaBrowser.Common.Extensions;
 using MediaBrowser.Controller.Library;
 using Microsoft.AspNetCore.Authorization;
 
@@ -50,6 +51,11 @@ namespace Jellyfin.Api.Auth.FirstTimeSetupPolicy
             }
 
             var user = _userManager.GetUserById(context.User.GetUserId());
+            if (user is null)
+            {
+                throw new ResourceNotFoundException();
+            }
+
             if (user.IsParentalScheduleAllowed())
             {
                 context.Succeed(requirement);

Jellyfin.Api/Auth/SyncPlayAccessPolicy/SyncPlayAccessHandler.cs

@@ -1,6 +1,7 @@
 using System.Threading.Tasks;
 using Jellyfin.Api.Extensions;
 using Jellyfin.Data.Enums;
+using MediaBrowser.Common.Extensions;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Controller.SyncPlay;
 using Microsoft.AspNetCore.Authorization;
@@ -33,6 +34,10 @@ namespace Jellyfin.Api.Auth.SyncPlayAccessPolicy
         {
             var userId = context.User.GetUserId();
             var user = _userManager.GetUserById(userId);
+            if (user is null)
+            {
+                throw new ResourceNotFoundException();
+            }
 
             if (requirement.RequiredAccess == SyncPlayAccessRequirementType.HasAccess)
             {

Jellyfin.Api/Auth/UserPermissionPolicy/UserPermissionHandler.cs

@@ -1,6 +1,7 @@
 using System.Threading.Tasks;
 using Jellyfin.Api.Auth.DownloadPolicy;
 using Jellyfin.Api.Extensions;
+using MediaBrowser.Common.Extensions;
 using MediaBrowser.Controller.Library;
 using Microsoft.AspNetCore.Authorization;
 
@@ -26,6 +27,11 @@ namespace Jellyfin.Api.Auth.UserPermissionPolicy
         protected override Task HandleRequirementAsync(AuthorizationHandlerContext context, UserPermissionRequirement requirement)
         {
             var user = _userManager.GetUserById(context.User.GetUserId());
+            if (user is null)
+            {
+                throw new ResourceNotFoundException();
+            }
+
             if (user.HasPermission(requirement.RequiredPermission))
             {
                 context.Succeed(requirement);