POST https://{APIDOMAIN}/api-v1/users/create
sex: Required; must be M or F
country: Required; must be a valid ISO Alpha-2 country code – see Geography
occupation: Required; must be a valid ISCO occupation code – see Occupations
group_uuid: Optional; if passed, joins the user to the specified group. Must be a valid group UUID (any UUID of a previously-created group within your org) – see Groups
If you wish to auto-assign, following these steps.