Vesta Control Panel - Forum

Good Morning.
I'm looking for a way to user softaculous API (licencied) with VestaCP, I already have both working fine individual.

At Softaculous API Docs say:

Each Control Panel has its own method of authentication. Some panels allow root/admin to access the enduser panel as the enduser over an API call.

But I can't figure out what method I should use with VestaCP

(Centos 7, Apache+Nginx)