If you booked with Sunshine before 12pm on 27th February 2024 and you're flying with Ryanair, here's some helpful articles that will ensure you're able to access your Ryanair booking:
Why have you created a unique email address for my Ryanair flight?
How do I verify my Ryanair account?
If you booked after 12pm on 27th February 2024 and you're looking for help with that head here.