Question on Plugin Usage

I want to implement a somewhat complicated access control for one of our quizzes, and I wonder if I can do this through a plugin.
Specifically, is there a way to intercept the onBeforeRenderQuiz event and tell Simple Quiz to go no farther?
If not, I have another way to do it through Joomla groups and permissions, but it's more convoluted.
TIA.

Hi John,

I can add a separate event if you prefer.

What would you like to have access to? What do you need to pass into the event arguments?

All I need is the user ID and a way to tell Simple Quiz not to proceed with the test.

Can I do that with this event?

If you somehow manipulate the application (e.g. call Factory::getApplication()->close() or redirect), then you can use the onBeforeRenderQuiz event.
If you want to stay on the same page and have a fully loaded template, but without the quiz, then I can add a separate event.

Let me know.

A separate event would be great, thanks.

Ok, so I just added the following event:
Set the $custom_access variable to false if you want the quiz rendering to stop. You may write your own text before doing so.
I have sent the update to your email.