Umami export/import format

Hey there,

not a bug or issue but a question regarding the import format when switching from umami. Tried contacting you via Reddit, but you didn't reply or see my message. How should the import for old data from umami look like? Since I selfhost umami, I don't have an export feature like you get when you use their cloud version, so I have to export manually through the postgres db. So how should I transform that data in a csv/how should the csv be structured and the columns named?

Thanks!