Hi Said,
I will treat this as a duplicate of the other one.
The recording from the Hackathon:
https://www.youtube.com/watch?v=OVwaXTitSRw
Slides from DevCon class by Keith White and Saikat Bhattacharya is the closest you can get:
Basically,
1. get the account ID from HQ UI
2. use GET hq/v1/accounts/{account_id}/companies to get a list of companies. choose a company.
3. use PATCH companies/:company_id to update the company info.
You will need to use 2-legged authentication for HQ API.