Migrate single users from owncloud to nextcloud

Please delete everything above when creating your topic and provide the following:

OwnCloud versin 10.0.5
Nextcloud version 12.0.5
Operating system and version Debian 9

I want to migrate from OwnCloud to NextCloud, i know there are a lot of tutorials about this.
But what I’m searching for is, the possibility to migrate single User from owncloud to nextcloud, so that i can migrate step by step single users and data.

is there any possibility? i couldn’t find anything…