Web form to Leads - approval mode not working with API 2.0

Web form to Leads - approval mode not working with API 2.0

New lead entries on our web form are entered in the CRM Leads module via WordPress plugins.  With the prior API, there was an option to have leads held for approval.  With the new API, this is no longer an option and entries go directly to the Leads module.  

This is a problem, as all entries need to be reviewed and approved.  Help!