[Druid] Attending DRUID conference as an observer

Hi DRUID team, I'm Juthathip Roonsook, a first year PhD student in Newcastle University Business School. I would like to attend the conference, however I haven't been in the stage for a presentation yet. I would like to ask if I could attend as an observer? And what are the required documents for this? Thank you so much for your answer in advance. Best regards, Juthathip Roonsook