User library

Hello the team,

First I would like to congratulate the team for the great work with EasySocial.
My only concern is about the lack of documentation for developers.
I'm not an expert and it's difficult for me to browse all the folders and to have an overview of the structure.

I have some question about User management.

I would like know which function I have to call in order to add a new user.
I guess that there is a function taking in parameter some data like username/ email/ password....
and sending back an answer : user added, user already stored....

I'm also wondering which function I have to call to manage the login.
Is there any function taking in parameter username and password and allowing to start the user's session?

Thank you in advance

Regards