How can I retrieve Apple ID user and password?

Hi everyone! Still many years ago (2012), my parents gave me the first Ipad mini gift. But I haven't used this iPad for a long time. I went to service and they updated and reset it for me, but the iPad requires my Apple ID and password. Unfortunately, I don't know these details. How can I retrieve them? I have attached two pictures (My Ipad is in Italian). Thanks in advance.

Sofia 😊

[Re-Titled by Moderator]