How to create user account via REST API while User Account Creation set to "none"?

Hi All,

Now we are building an employee integration via REST API. In its design, some employees will not generate user account.
So we set "User Account Creation" under task Manage Enterprise HCM Information to "none", which disable the auto-generate user account.

But one we set this, the user account creation REST API will return:

The requested action can't be done because the corresponding enterprise option is suppressing it. (PER-1532373)

May I ask if there is any way we can meet our requirement: Create user account for specific employees only.

Thanks in advance!

Weitao