Hi,
I am working on my first Nextcloud app and have a problem with creating new users programmatically. When calling IUserManager::createUser() everything seems to work alright except the subfolder data/{uid}/files is not created. data/{uid} and data/{uid}/cache are created.
Am I doing something fundamentally wrong?
Thanks in advance for some hints.
Cheers
Björn
Ok, it turns out that folders are created on first login and not when the user is created. Since I am also programmatically logging in the newly created user right away, the issue seems to be located in this area. I will do some research.
Calling IRootFolder::getUserFolder() after creating the user fixes the issue. 
congratulations! 
thank you for posting the answer also for future reference!