Use ToList instead of AsEnumerable due to delayed execution

Jellyfin.Server.Implementations/Users/UserManager.cs

@@ -96,7 +96,7 @@ namespace Jellyfin.Server.Implementations.Users
                     .Include(user => user.Preferences)
                     .Include(user => user.AccessSchedules)
                     .Include(user => user.ProfileImage)
-                    .AsEnumerable();
+                    .ToList();
             }
         }