Fix interactivity check and git helper arg value

GitTokenCredentialProvider.cs

@@ -45,7 +45,7 @@ sealed class GitTokenCredentialProvider : ICredentialProvider
       return new GetAuthenticationCredentialsResponse(null, null, null, null, responseCode: MessageResponseCode.Error);
 
     pHelper.StandardInput.WriteLine("protocol=https");
-    pHelper.StandardInput.WriteLine("username=s" + TokenUserName);
+    pHelper.StandardInput.WriteLine("username=" + TokenUserName);
     pHelper.StandardInput.WriteLine("host=" + request.Uri.DnsSafeHost);
     pHelper.StandardInput.WriteLine();
 
@@ -64,7 +64,7 @@ sealed class GitTokenCredentialProvider : ICredentialProvider
     }
 
     // Password not found (we may be allowed to ask for it interactively)
-    if (request.CanShowDialog)
+    if (!request.IsNonInteractive)
     {
       ProcessStartInfo psiDialog = new ProcessStartInfo();
       psiDialog.FileName = "zenity";

Program.cs

@@ -10,8 +10,6 @@ public static class Program
 
 	public static async Task<int> Main(string[] args)
 	{
-		File.WriteAllText("/home/rv/temp/nsc.log", "Starting");
-
 		CancellationTokenSource tokenSource = new CancellationTokenSource();
 
 		List<ICredentialProvider> credentialProviders = new List<ICredentialProvider>
@@ -103,6 +101,7 @@ public static class Program
 		catch (Exception e)
 		{
 			Console.Error.WriteLine("Error " + e.GetType().Name + ": " + e.Message);
+			File.WriteAllText("/home/rv/temp/nsc.error.log", "Error " + e.GetType().Name + ": " + e.Message);
 			return 1;
 		}
 	}