upgrade packages, and delete a few unneeded ones

fix search for client resulting in invalid GUID parse
simplify output from dvar not being found
make sure to prompt if not all servers could be reached

WebfrontCore/Controllers/AccountController.cs

@@ -25,7 +25,7 @@ namespace WebfrontCore.Controllers
 
             try
             {
-                var privilegedClient = Manager.PrivilegedClients[clientId];
+                var privilegedClient = await Manager.GetClientService().Get(clientId);
                 bool loginSuccess = Manager.TokenAuthenticator.AuthorizeToken(privilegedClient.NetworkId, password) ||
                     (await Task.FromResult(SharedLibraryCore.Helpers.Hashing.Hash(password, privilegedClient.PasswordSalt)))[0] == privilegedClient.Password;