Programmatically expand/close ion-accordion?

I’m using an ion-accordion-group with a single ion-accordion to expose the answer to a question. I’d like to use a timer to open/close the accordion contents. But, I don’t see any props that I can use to control it?

The state of the accordion is managed via the groups value. Read here:Ion-Accordion Components: How to Build & Examples | Ionic

Thanks, I don’t know how I missed that!