fixed bug with worker service

IdentityProvider/Properties/launchSettings.json

   "profiles": {
     "IIS Express": {
       "commandName": "IISExpress",
-      "launchBrowser": true,
+      "launchBrowser": false,
       "inspectUri": "{wsProtocol}://{url.hostname}:{url.port}/_framework/debug/ws-proxy?browser={browserInspectUri}",
       "environmentVariables": {
         "ASPNETCORE_ENVIRONMENT": "Development"
     "SpotifyService": {
       "commandName": "Project",
       "dotnetRunMessages": "true",
-      "launchBrowser": true,
+      "launchBrowser": false,
       "inspectUri": "{wsProtocol}://{url.hostname}:{url.port}/_framework/debug/ws-proxy?browser={browserInspectUri}",
       "applicationUrl": "https://localhost:5001;http://localhost:5000",
       "environmentVariables": {

SpotifyWorker/Worker.cs

                                 await _identityService.SaveTrackAsync(new GrpcShared.DTO.Db.SaveTrackRequest
                                 {
                                     Album = track.Item.Album.Name,
-                                    Artist = track.Item.Artists.Single().Name,
+                                    Artist = track.Item.Artists[0].Name,
                                     Title = track.Item.Name,
                                     TrackId = track.Item.Id,
                                     UserId = res[i].Id