Fix breakage in process running

Author: shana

src/GitHub.Api/Authentication/LoginManager.cs

@@ -261,7 +261,7 @@ string password
 
             ApplicationAuthorization auth = null;
             var loginTask = new SimpleListProcessTask(taskManager.Token, loginTool, $"login --host={host}");
-            loginTask.Configure(processManager, true);
+            loginTask.Configure(processManager, workingDirectory: loginTool.Parent, withInput: true);
             loginTask.OnStartProcess += proc =>
             {
                 proc.StandardInput.WriteLine(username);

src/GitHub.Api/OutputProcessors/ProcessManager.cs

@@ -41,8 +41,6 @@ public T Configure<T>(T processTask, NPath executable = null, string arguments =
                 StandardErrorEncoding = Encoding.UTF8
             };
 
-            if (!executable.IsRelative)
-                workingDirectory = executable.Parent;
             gitEnvironment.Configure(startInfo, workingDirectory ?? environment.RepositoryPath);
 
             if (executable.IsRelative)