Send Welcome email to support user created via API

I'm not finding how to have a Welcome email sent to a new user when that user is created via a REST call to the API.

It seems that it should be possible, according to this blurb 

Note: Before you begin creating users through the API, make sure to configure your account settings in Zendesk Support to get the results you want. For example, do you want to send welcome emails automatically to the new users?

from here.

Any guidance? Thanks in advance!