Add to Calendar Button on signup

Hi, Thanks for a great bit of software, installed for my football club to try and get some organisation around volunteering. I have bought all the plugins and been playing round.

One thing that I would love is when someone has signed up, that there is a button for them to add to their calendar (Phone, Outlook ect..). Wondering if this is hard to do, or how it can be integrated with a seperate plugin like https://add-to-calendar-button.com by passing variables into the shortcode?

Thanks

Andrew