API - single sign on

[unitminer]

Is there any API documentation / examples for v 5.0.1 ?

I would like to develop in our application automatic login of users logged into our application also to vbulletin forum

I guess I will need to do following steps with API calls:

1. check if user exists in forum
2. if not, create user account
3. login user
4. disable account (e.g. if we delete account in our application)

Did anybody the same using the API?

I want to do it it from other server

Our situation: we have forum on domain forum.example.com and main application is running on www.example.com. Both are separated servers

Thank you.