How to import users from an other Membership1 installation?

Hello

I am currently building a new version of a running website

This website is the new version and is almost ready for transfer.

The last step is to import members from old website but I just realised that there was no simple solution at the moment to export user from memberships1 (all datas) and import in Membership2

I looked onlline but didn't really find th right solution to do it.

Should I copy the user database from my old website to the new one and then import datas from membership2?

Thank you very much in advance