I've been asked to import users from a drupal 7 site into an already-built drupal 8 site. I also need their order history from drupal commerce.
I tried using
drush migrate-upgrade --config-only to do this, but as of drush 9, the migrate-upgrade etc commands don't work. There is a bug report about this and several patches, but my understanding of drush isn't advanced enough to properly patch & test.
Is there a way this can be done without needing to use drush?