use trakt user slug for proper url generation (#1859)

CHANGELOG.md

@@ -58,6 +58,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
   - Previously, this deco item would be ignored so watermark and filler would be missing
 - Fix movies with missing medata by generating fallback metadata
   - This allows these movies to appear in the Trash where they can be deleted
+- Fix synchronizing trakt lists from users with special characters in their username
+  - Note that these lists MUST be added as URLs; the short-form `user/list` will NOT work with special characters
 
 ### Changed
 - Remove some unnecessary API calls related to media server scanning and paging

ErsatzTV.Infrastructure/Trakt/Models/TraktUser.cs

@@ -3,4 +3,6 @@
 public class TraktUser
 {
     public string Username { get; set; }
+
+    public TraktListIds Ids { get; set; }
 }

ErsatzTV.Infrastructure/Trakt/TraktApiClient.cs

@@ -38,7 +38,10 @@ public class TraktApiClient : ITraktApiClient
             return new TraktList
             {
                 TraktId = response.Ids.Trakt,
-                User = response.User.Username,
+
+                // slug must be used here for proper URL generation
+                User = response.User.Ids.Slug,
+
                 List = response.Ids.Slug,
                 Name = response.Name,
                 Description = response.Description,