How should I run a background task that also updates the UI in an intellij settings plugin - intellij-idea

Question

I am adding some changes to an intelij plugin that integrates with vault I have settings page that implements Configurable that has a form for credentials and then a "Test Login" button. On button click I want to spawn an asynchronous background task to test the credentials and then update the UI with either success or failure.
Here is a screenshot of my settings
As far as I can tell the correct way to do this would be to use a background task but that requires a "project" which as far as I can tell you have to get from an AnAction and I don't really see how that would work in this context. Here are a few approaches I've played around with
This still blocks the UI and spits out a warning about the UI being blocked for too long
ApplicationManager.getApplication().executeOnPooledThread(() ->
ApplicationManager.getApplication().invokeLaterOnWriteThread(() -> {
// async work
// repaint
}, ModalityState.stateForComponent(myMainPanel)));
// I don't know how to get the project or if I even should here.
ProgressManager.getInstance().run(new Task.Backgroundable(project, "Login"){
public void run(#NotNull ProgressIndicator progressIndicator) {
// async work
// repaint when done
}});
All of this is happening in my AppSettingsComponent button click addActionListener. Here is my complete source code on github

Answer 1

I had the same problem with the project instance required. But by looking at the Task.Backgroundable constructor you can pass a #Nullable project. So I just pass null and it works well for me.
ProgressManager.getInstance().run(new Task.Backgroundable(null, "Login") {
public void run(#NotNull ProgressIndicator progressIndicator) {
// your stuff
}
});