Security Provider for custom authentication service

I apologize if this question has been answered. I was unable to find anything by searching.

I’m new to Wappler. I have an existing in-house authentication service (user/pswd, permissions) that I’d like to use with Wappler - i.e. when I fill out the Wappler login form I’d like our in-house authentication service to be called.

Should I just define and call the API? Is there a way to integrate into the Security Provider architecture?

Am I even asking the right question?